21308140

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{1279}}^1$

素因数の和:1319

約数の個数: 72

約数和(自身を含む): 55157760

約数和(自身を除く): 33849620

約数列:

[1, 2, 4, 5, 7, 10, 14, 17, 20, 28, 34, 35, 49, 68, 70, 85, 98, 119, 140, 170, 196, 238, 245, 340, 476, 490, 595, 833, 980, 1190, 1279, 1666, 2380, 2558, 3332, 4165, 5116, 6395, 8330, 8953, 12790, 16660, 17906, 21743, 25580, 35812, 43486, 44765, 62671, 86972, 89530, 108715, 125342, 152201, 179060, 217430, 250684, 304402, 313355, 434860, 608804, 626710, 761005, 1065407, 1253420, 1522010, 2130814, 3044020, 4261628, 5327035, 10654070, 21308140]

約数ペア:

[(1, 21308140), (2, 10654070), (4, 5327035), (5, 4261628), (7, 3044020), (10, 2130814), (14, 1522010), (17, 1253420), (20, 1065407), (28, 761005), (34, 626710), (35, 608804), (49, 434860), (68, 313355), (70, 304402), (85, 250684), (98, 217430), (119, 179060), (140, 152201), (170, 125342), (196, 108715), (238, 89530), (245, 86972), (340, 62671), (476, 44765), (490, 43486), (595, 35812), (833, 25580), (980, 21743), (1190, 17906), (1279, 16660), (1666, 12790), (2380, 8953), (2558, 8330), (3332, 6395), (4165, 5116)]