21165550

素因数分解:

$2^1\times 5^2\times 7^2\times {\mathrm{53}}^1\times {\mathrm{163}}^1$

素因数の和:242

約数の個数: 72

約数和(自身を含む): 46945656

約数和(自身を除く): 25780106

約数列:

[1, 2, 5, 7, 10, 14, 25, 35, 49, 50, 53, 70, 98, 106, 163, 175, 245, 265, 326, 350, 371, 490, 530, 742, 815, 1141, 1225, 1325, 1630, 1855, 2282, 2450, 2597, 2650, 3710, 4075, 5194, 5705, 7987, 8150, 8639, 9275, 11410, 12985, 15974, 17278, 18550, 25970, 28525, 39935, 43195, 57050, 60473, 64925, 79870, 86390, 120946, 129850, 199675, 215975, 302365, 399350, 423311, 431950, 604730, 846622, 1511825, 2116555, 3023650, 4233110, 10582775, 21165550]

約数ペア:

[(1, 21165550), (2, 10582775), (5, 4233110), (7, 3023650), (10, 2116555), (14, 1511825), (25, 846622), (35, 604730), (49, 431950), (50, 423311), (53, 399350), (70, 302365), (98, 215975), (106, 199675), (163, 129850), (175, 120946), (245, 86390), (265, 79870), (326, 64925), (350, 60473), (371, 57050), (490, 43195), (530, 39935), (742, 28525), (815, 25970), (1141, 18550), (1225, 17278), (1325, 15974), (1630, 12985), (1855, 11410), (2282, 9275), (2450, 8639), (2597, 8150), (2650, 7987), (3710, 5705), (4075, 5194)]