19889940

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1$

素因数の和:142

約数の個数: 192

約数和(自身を含む): 69672960

約数和(自身を除く): 49783020

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 23, 28, 29, 30, 35, 42, 46, 58, 60, 69, 70, 71, 84, 87, 92, 105, 115, 116, 138, 140, 142, 145, 161, 174, 203, 210, 213, 230, 276, 284, 290, 322, 345, 348, 355, 406, 420, 426, 435, 460, 483, 497, 580, 609, 644, 667, 690, 710, 805, 812, 852, 870, 966, 994, 1015, 1065, 1218, 1334, 1380, 1420, 1491, 1610, 1633, 1740, 1932, 1988, 2001, 2030, 2059, 2130, 2415, 2436, 2485, 2668, 2982, 3045, 3220, 3266, 3335, 4002, 4060, 4118, 4260, 4669, 4830, 4899, 4970, 5964, 6090, 6177, 6532, 6670, 7455, 8004, 8165, 8236, 9338, 9660, 9798, 9940, 10005, 10295, 11431, 12180, 12354, 13340, 14007, 14413, 14910, 16330, 18676, 19596, 20010, 20590, 22862, 23345, 24495, 24708, 28014, 28826, 29820, 30885, 32660, 34293, 40020, 41180, 43239, 45724, 46690, 47357, 48990, 56028, 57155, 57652, 61770, 68586, 70035, 72065, 86478, 93380, 94714, 97980, 114310, 123540, 137172, 140070, 142071, 144130, 171465, 172956, 189428, 216195, 228620, 236785, 280140, 284142, 288260, 331499, 342930, 432390, 473570, 568284, 662998, 685860, 710355, 864780, 947140, 994497, 1325996, 1420710, 1657495, 1988994, 2841420, 3314990, 3977988, 4972485, 6629980, 9944970, 19889940]

約数ペア:

[(1, 19889940), (2, 9944970), (3, 6629980), (4, 4972485), (5, 3977988), (6, 3314990), (7, 2841420), (10, 1988994), (12, 1657495), (14, 1420710), (15, 1325996), (20, 994497), (21, 947140), (23, 864780), (28, 710355), (29, 685860), (30, 662998), (35, 568284), (42, 473570), (46, 432390), (58, 342930), (60, 331499), (69, 288260), (70, 284142), (71, 280140), (84, 236785), (87, 228620), (92, 216195), (105, 189428), (115, 172956), (116, 171465), (138, 144130), (140, 142071), (142, 140070), (145, 137172), (161, 123540), (174, 114310), (203, 97980), (210, 94714), (213, 93380), (230, 86478), (276, 72065), (284, 70035), (290, 68586), (322, 61770), (345, 57652), (348, 57155), (355, 56028), (406, 48990), (420, 47357), (426, 46690), (435, 45724), (460, 43239), (483, 41180), (497, 40020), (580, 34293), (609, 32660), (644, 30885), (667, 29820), (690, 28826), (710, 28014), (805, 24708), (812, 24495), (852, 23345), (870, 22862), (966, 20590), (994, 20010), (1015, 19596), (1065, 18676), (1218, 16330), (1334, 14910), (1380, 14413), (1420, 14007), (1491, 13340), (1610, 12354), (1633, 12180), (1740, 11431), (1932, 10295), (1988, 10005), (2001, 9940), (2030, 9798), (2059, 9660), (2130, 9338), (2415, 8236), (2436, 8165), (2485, 8004), (2668, 7455), (2982, 6670), (3045, 6532), (3220, 6177), (3266, 6090), (3335, 5964), (4002, 4970), (4060, 4899), (4118, 4830), (4260, 4669)]