991594520

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{1609}}^1$

素因数の和:1729

約数の個数: 128

約数和(自身を含む): 2670796800

約数和(自身を除く): 1679202280

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 31, 35, 40, 56, 62, 70, 71, 124, 140, 142, 155, 217, 248, 280, 284, 310, 355, 434, 497, 568, 620, 710, 868, 994, 1085, 1240, 1420, 1609, 1736, 1988, 2170, 2201, 2485, 2840, 3218, 3976, 4340, 4402, 4970, 6436, 8045, 8680, 8804, 9940, 11005, 11263, 12872, 15407, 16090, 17608, 19880, 22010, 22526, 30814, 32180, 44020, 45052, 49879, 56315, 61628, 64360, 77035, 88040, 90104, 99758, 112630, 114239, 123256, 154070, 199516, 225260, 228478, 249395, 308140, 349153, 399032, 450520, 456956, 498790, 571195, 616280, 698306, 799673, 913912, 997580, 1142390, 1396612, 1599346, 1745765, 1995160, 2284780, 2793224, 3198692, 3491530, 3541409, 3998365, 4569560, 6397384, 6983060, 7082818, 7996730, 13966120, 14165636, 15993460, 17707045, 24789863, 28331272, 31986920, 35414090, 49579726, 70828180, 99159452, 123949315, 141656360, 198318904, 247898630, 495797260, 991594520]

約数ペア:

[(1, 991594520), (2, 495797260), (4, 247898630), (5, 198318904), (7, 141656360), (8, 123949315), (10, 99159452), (14, 70828180), (20, 49579726), (28, 35414090), (31, 31986920), (35, 28331272), (40, 24789863), (56, 17707045), (62, 15993460), (70, 14165636), (71, 13966120), (124, 7996730), (140, 7082818), (142, 6983060), (155, 6397384), (217, 4569560), (248, 3998365), (280, 3541409), (284, 3491530), (310, 3198692), (355, 2793224), (434, 2284780), (497, 1995160), (568, 1745765), (620, 1599346), (710, 1396612), (868, 1142390), (994, 997580), (1085, 913912), (1240, 799673), (1420, 698306), (1609, 616280), (1736, 571195), (1988, 498790), (2170, 456956), (2201, 450520), (2485, 399032), (2840, 349153), (3218, 308140), (3976, 249395), (4340, 228478), (4402, 225260), (4970, 199516), (6436, 154070), (8045, 123256), (8680, 114239), (8804, 112630), (9940, 99758), (11005, 90104), (11263, 88040), (12872, 77035), (15407, 64360), (16090, 61628), (17608, 56315), (19880, 49879), (22010, 45052), (22526, 44020), (30814, 32180)]