1279380400

素因数分解:

$2^4\times 5^2\times {\mathrm{41}}^1\times {\mathrm{181}}^1\times {\mathrm{431}}^1$

素因数の和:671

約数の個数: 120

約数和(自身を含む): 3173421888

約数和(自身を除く): 1894041488

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 41, 50, 80, 82, 100, 164, 181, 200, 205, 328, 362, 400, 410, 431, 656, 724, 820, 862, 905, 1025, 1448, 1640, 1724, 1810, 2050, 2155, 2896, 3280, 3448, 3620, 4100, 4310, 4525, 6896, 7240, 7421, 8200, 8620, 9050, 10775, 14480, 14842, 16400, 17240, 17671, 18100, 21550, 29684, 34480, 35342, 36200, 37105, 43100, 59368, 70684, 72400, 74210, 78011, 86200, 88355, 118736, 141368, 148420, 156022, 172400, 176710, 185525, 282736, 296840, 312044, 353420, 371050, 390055, 441775, 593680, 624088, 706840, 742100, 780110, 883550, 1248176, 1413680, 1484200, 1560220, 1767100, 1950275, 2968400, 3120440, 3198451, 3534200, 3900550, 6240880, 6396902, 7068400, 7801100, 12793804, 15602200, 15992255, 25587608, 31204400, 31984510, 51175216, 63969020, 79961275, 127938040, 159922550, 255876080, 319845100, 639690200, 1279380400]

約数ペア:

[(1, 1279380400), (2, 639690200), (4, 319845100), (5, 255876080), (8, 159922550), (10, 127938040), (16, 79961275), (20, 63969020), (25, 51175216), (40, 31984510), (41, 31204400), (50, 25587608), (80, 15992255), (82, 15602200), (100, 12793804), (164, 7801100), (181, 7068400), (200, 6396902), (205, 6240880), (328, 3900550), (362, 3534200), (400, 3198451), (410, 3120440), (431, 2968400), (656, 1950275), (724, 1767100), (820, 1560220), (862, 1484200), (905, 1413680), (1025, 1248176), (1448, 883550), (1640, 780110), (1724, 742100), (1810, 706840), (2050, 624088), (2155, 593680), (2896, 441775), (3280, 390055), (3448, 371050), (3620, 353420), (4100, 312044), (4310, 296840), (4525, 282736), (6896, 185525), (7240, 176710), (7421, 172400), (8200, 156022), (8620, 148420), (9050, 141368), (10775, 118736), (14480, 88355), (14842, 86200), (16400, 78011), (17240, 74210), (17671, 72400), (18100, 70684), (21550, 59368), (29684, 43100), (34480, 37105), (35342, 36200)]