21236880

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{12641}}^1$

素因数の和:12664

約数の個数: 80

約数和(自身を含む): 75245184

約数和(自身を除く): 54008304

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 48, 56, 60, 70, 80, 84, 105, 112, 120, 140, 168, 210, 240, 280, 336, 420, 560, 840, 1680, 12641, 25282, 37923, 50564, 63205, 75846, 88487, 101128, 126410, 151692, 176974, 189615, 202256, 252820, 265461, 303384, 353948, 379230, 442435, 505640, 530922, 606768, 707896, 758460, 884870, 1011280, 1061844, 1327305, 1415792, 1516920, 1769740, 2123688, 2654610, 3033840, 3539480, 4247376, 5309220, 7078960, 10618440, 21236880]

約数ペア:

[(1, 21236880), (2, 10618440), (3, 7078960), (4, 5309220), (5, 4247376), (6, 3539480), (7, 3033840), (8, 2654610), (10, 2123688), (12, 1769740), (14, 1516920), (15, 1415792), (16, 1327305), (20, 1061844), (21, 1011280), (24, 884870), (28, 758460), (30, 707896), (35, 606768), (40, 530922), (42, 505640), (48, 442435), (56, 379230), (60, 353948), (70, 303384), (80, 265461), (84, 252820), (105, 202256), (112, 189615), (120, 176974), (140, 151692), (168, 126410), (210, 101128), (240, 88487), (280, 75846), (336, 63205), (420, 50564), (560, 37923), (840, 25282), (1680, 12641)]