20302020

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{43}}^2\times {\mathrm{61}}^1$

素因数の和:162

約数の個数: 108

約数和(自身を含む): 64081836

約数和(自身を除く): 43779816

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 43, 45, 60, 61, 86, 90, 122, 129, 172, 180, 183, 215, 244, 258, 305, 366, 387, 430, 516, 549, 610, 645, 732, 774, 860, 915, 1098, 1220, 1290, 1548, 1830, 1849, 1935, 2196, 2580, 2623, 2745, 3660, 3698, 3870, 5246, 5490, 5547, 7396, 7740, 7869, 9245, 10492, 10980, 11094, 13115, 15738, 16641, 18490, 22188, 23607, 26230, 27735, 31476, 33282, 36980, 39345, 47214, 52460, 55470, 66564, 78690, 83205, 94428, 110940, 112789, 118035, 157380, 166410, 225578, 236070, 332820, 338367, 451156, 472140, 563945, 676734, 1015101, 1127890, 1353468, 1691835, 2030202, 2255780, 3383670, 4060404, 5075505, 6767340, 10151010, 20302020]

約数ペア:

[(1, 20302020), (2, 10151010), (3, 6767340), (4, 5075505), (5, 4060404), (6, 3383670), (9, 2255780), (10, 2030202), (12, 1691835), (15, 1353468), (18, 1127890), (20, 1015101), (30, 676734), (36, 563945), (43, 472140), (45, 451156), (60, 338367), (61, 332820), (86, 236070), (90, 225578), (122, 166410), (129, 157380), (172, 118035), (180, 112789), (183, 110940), (215, 94428), (244, 83205), (258, 78690), (305, 66564), (366, 55470), (387, 52460), (430, 47214), (516, 39345), (549, 36980), (610, 33282), (645, 31476), (732, 27735), (774, 26230), (860, 23607), (915, 22188), (1098, 18490), (1220, 16641), (1290, 15738), (1548, 13115), (1830, 11094), (1849, 10980), (1935, 10492), (2196, 9245), (2580, 7869), (2623, 7740), (2745, 7396), (3660, 5547), (3698, 5490), (3870, 5246)]