28657020

素因数分解:

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

素因数の和:152

約数の個数: 144

約数和(自身を含む): 96090624

約数和(自身を除く): 67433604

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 31, 35, 42, 60, 62, 70, 71, 84, 93, 105, 124, 140, 142, 155, 186, 210, 213, 217, 284, 310, 355, 372, 420, 426, 434, 465, 497, 620, 651, 710, 852, 868, 930, 961, 994, 1065, 1085, 1302, 1420, 1491, 1860, 1922, 1988, 2130, 2170, 2201, 2485, 2604, 2883, 2982, 3255, 3844, 4260, 4340, 4402, 4805, 4970, 5766, 5964, 6510, 6603, 6727, 7455, 8804, 9610, 9940, 11005, 11532, 13020, 13206, 13454, 14415, 14910, 15407, 19220, 20181, 22010, 26412, 26908, 28830, 29820, 30814, 33015, 33635, 40362, 44020, 46221, 57660, 61628, 66030, 67270, 68231, 77035, 80724, 92442, 100905, 132060, 134540, 136462, 154070, 184884, 201810, 204693, 231105, 272924, 308140, 341155, 403620, 409386, 462210, 477617, 682310, 818772, 924420, 955234, 1023465, 1364620, 1432851, 1910468, 2046930, 2388085, 2865702, 4093860, 4776170, 5731404, 7164255, 9552340, 14328510, 28657020]

約数ペア:

[(1, 28657020), (2, 14328510), (3, 9552340), (4, 7164255), (5, 5731404), (6, 4776170), (7, 4093860), (10, 2865702), (12, 2388085), (14, 2046930), (15, 1910468), (20, 1432851), (21, 1364620), (28, 1023465), (30, 955234), (31, 924420), (35, 818772), (42, 682310), (60, 477617), (62, 462210), (70, 409386), (71, 403620), (84, 341155), (93, 308140), (105, 272924), (124, 231105), (140, 204693), (142, 201810), (155, 184884), (186, 154070), (210, 136462), (213, 134540), (217, 132060), (284, 100905), (310, 92442), (355, 80724), (372, 77035), (420, 68231), (426, 67270), (434, 66030), (465, 61628), (497, 57660), (620, 46221), (651, 44020), (710, 40362), (852, 33635), (868, 33015), (930, 30814), (961, 29820), (994, 28830), (1065, 26908), (1085, 26412), (1302, 22010), (1420, 20181), (1491, 19220), (1860, 15407), (1922, 14910), (1988, 14415), (2130, 13454), (2170, 13206), (2201, 13020), (2485, 11532), (2604, 11005), (2883, 9940), (2982, 9610), (3255, 8804), (3844, 7455), (4260, 6727), (4340, 6603), (4402, 6510), (4805, 5964), (4970, 5766)]