21261660

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1$

素因数の和:144

約数の個数: 192

約数和(自身を含む): 74317824

約数和(自身を除く): 53056164

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 23, 28, 30, 31, 35, 42, 46, 60, 62, 69, 70, 71, 84, 92, 93, 105, 115, 124, 138, 140, 142, 155, 161, 186, 210, 213, 217, 230, 276, 284, 310, 322, 345, 355, 372, 420, 426, 434, 460, 465, 483, 497, 620, 644, 651, 690, 710, 713, 805, 852, 868, 930, 966, 994, 1065, 1085, 1302, 1380, 1420, 1426, 1491, 1610, 1633, 1860, 1932, 1988, 2130, 2139, 2170, 2201, 2415, 2485, 2604, 2852, 2982, 3220, 3255, 3266, 3565, 4260, 4278, 4340, 4402, 4830, 4899, 4970, 4991, 5964, 6510, 6532, 6603, 7130, 7455, 8165, 8556, 8804, 9660, 9798, 9940, 9982, 10695, 11005, 11431, 13020, 13206, 14260, 14910, 14973, 15407, 16330, 19596, 19964, 21390, 22010, 22862, 24495, 24955, 26412, 29820, 29946, 30814, 32660, 33015, 34293, 42780, 44020, 45724, 46221, 48990, 49910, 50623, 57155, 59892, 61628, 66030, 68586, 74865, 77035, 92442, 97980, 99820, 101246, 114310, 132060, 137172, 149730, 151869, 154070, 171465, 184884, 202492, 228620, 231105, 253115, 299460, 303738, 308140, 342930, 354361, 462210, 506230, 607476, 685860, 708722, 759345, 924420, 1012460, 1063083, 1417444, 1518690, 1771805, 2126166, 3037380, 3543610, 4252332, 5315415, 7087220, 10630830, 21261660]

約数ペア:

[(1, 21261660), (2, 10630830), (3, 7087220), (4, 5315415), (5, 4252332), (6, 3543610), (7, 3037380), (10, 2126166), (12, 1771805), (14, 1518690), (15, 1417444), (20, 1063083), (21, 1012460), (23, 924420), (28, 759345), (30, 708722), (31, 685860), (35, 607476), (42, 506230), (46, 462210), (60, 354361), (62, 342930), (69, 308140), (70, 303738), (71, 299460), (84, 253115), (92, 231105), (93, 228620), (105, 202492), (115, 184884), (124, 171465), (138, 154070), (140, 151869), (142, 149730), (155, 137172), (161, 132060), (186, 114310), (210, 101246), (213, 99820), (217, 97980), (230, 92442), (276, 77035), (284, 74865), (310, 68586), (322, 66030), (345, 61628), (355, 59892), (372, 57155), (420, 50623), (426, 49910), (434, 48990), (460, 46221), (465, 45724), (483, 44020), (497, 42780), (620, 34293), (644, 33015), (651, 32660), (690, 30814), (710, 29946), (713, 29820), (805, 26412), (852, 24955), (868, 24495), (930, 22862), (966, 22010), (994, 21390), (1065, 19964), (1085, 19596), (1302, 16330), (1380, 15407), (1420, 14973), (1426, 14910), (1491, 14260), (1610, 13206), (1633, 13020), (1860, 11431), (1932, 11005), (1988, 10695), (2130, 9982), (2139, 9940), (2170, 9798), (2201, 9660), (2415, 8804), (2485, 8556), (2604, 8165), (2852, 7455), (2982, 7130), (3220, 6603), (3255, 6532), (3266, 6510), (3565, 5964), (4260, 4991), (4278, 4970), (4340, 4899), (4402, 4830)]