21513760

素因数分解:

$2^5\times 5^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{59}}^1$

素因数の和:170

約数の個数: 96

約数和(自身を含む): 53887680

約数和(自身を除く): 32373920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 43, 53, 59, 80, 86, 106, 118, 160, 172, 212, 215, 236, 265, 295, 344, 424, 430, 472, 530, 590, 688, 848, 860, 944, 1060, 1180, 1376, 1696, 1720, 1888, 2120, 2279, 2360, 2537, 3127, 3440, 4240, 4558, 4720, 5074, 6254, 6880, 8480, 9116, 9440, 10148, 11395, 12508, 12685, 15635, 18232, 20296, 22790, 25016, 25370, 31270, 36464, 40592, 45580, 50032, 50740, 62540, 72928, 81184, 91160, 100064, 101480, 125080, 134461, 182320, 202960, 250160, 268922, 364640, 405920, 500320, 537844, 672305, 1075688, 1344610, 2151376, 2689220, 4302752, 5378440, 10756880, 21513760]

約数ペア:

[(1, 21513760), (2, 10756880), (4, 5378440), (5, 4302752), (8, 2689220), (10, 2151376), (16, 1344610), (20, 1075688), (32, 672305), (40, 537844), (43, 500320), (53, 405920), (59, 364640), (80, 268922), (86, 250160), (106, 202960), (118, 182320), (160, 134461), (172, 125080), (212, 101480), (215, 100064), (236, 91160), (265, 81184), (295, 72928), (344, 62540), (424, 50740), (430, 50032), (472, 45580), (530, 40592), (590, 36464), (688, 31270), (848, 25370), (860, 25016), (944, 22790), (1060, 20296), (1180, 18232), (1376, 15635), (1696, 12685), (1720, 12508), (1888, 11395), (2120, 10148), (2279, 9440), (2360, 9116), (2537, 8480), (3127, 6880), (3440, 6254), (4240, 5074), (4558, 4720)]