198920800

素因数分解:

$2^5\times 5^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{617}}^1$

素因数の和:681

約数の個数: 144

約数和(自身を含む): 540715392

約数和(自身を除く): 341794592

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 31, 32, 40, 50, 52, 62, 65, 80, 100, 104, 124, 130, 155, 160, 200, 208, 248, 260, 310, 325, 400, 403, 416, 496, 520, 617, 620, 650, 775, 800, 806, 992, 1040, 1234, 1240, 1300, 1550, 1612, 2015, 2080, 2468, 2480, 2600, 3085, 3100, 3224, 4030, 4936, 4960, 5200, 6170, 6200, 6448, 8021, 8060, 9872, 10075, 10400, 12340, 12400, 12896, 15425, 16042, 16120, 19127, 19744, 20150, 24680, 24800, 30850, 32084, 32240, 38254, 40105, 40300, 49360, 61700, 64168, 64480, 76508, 80210, 80600, 95635, 98720, 123400, 128336, 153016, 160420, 161200, 191270, 200525, 246800, 248651, 256672, 306032, 320840, 322400, 382540, 401050, 478175, 493600, 497302, 612064, 641680, 765080, 802100, 956350, 994604, 1243255, 1283360, 1530160, 1604200, 1912700, 1989208, 2486510, 3060320, 3208400, 3825400, 3978416, 4973020, 6216275, 6416800, 7650800, 7956832, 9946040, 12432550, 15301600, 19892080, 24865100, 39784160, 49730200, 99460400, 198920800]

約数ペア:

[(1, 198920800), (2, 99460400), (4, 49730200), (5, 39784160), (8, 24865100), (10, 19892080), (13, 15301600), (16, 12432550), (20, 9946040), (25, 7956832), (26, 7650800), (31, 6416800), (32, 6216275), (40, 4973020), (50, 3978416), (52, 3825400), (62, 3208400), (65, 3060320), (80, 2486510), (100, 1989208), (104, 1912700), (124, 1604200), (130, 1530160), (155, 1283360), (160, 1243255), (200, 994604), (208, 956350), (248, 802100), (260, 765080), (310, 641680), (325, 612064), (400, 497302), (403, 493600), (416, 478175), (496, 401050), (520, 382540), (617, 322400), (620, 320840), (650, 306032), (775, 256672), (800, 248651), (806, 246800), (992, 200525), (1040, 191270), (1234, 161200), (1240, 160420), (1300, 153016), (1550, 128336), (1612, 123400), (2015, 98720), (2080, 95635), (2468, 80600), (2480, 80210), (2600, 76508), (3085, 64480), (3100, 64168), (3224, 61700), (4030, 49360), (4936, 40300), (4960, 40105), (5200, 38254), (6170, 32240), (6200, 32084), (6448, 30850), (8021, 24800), (8060, 24680), (9872, 20150), (10075, 19744), (10400, 19127), (12340, 16120), (12400, 16042), (12896, 15425)]