21305060

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{4909}}^1$

素因数の和:4956

約数の個数: 48

約数和(自身を含む): 52792320

約数和(自身を除く): 31487260

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 62, 70, 124, 140, 155, 217, 310, 434, 620, 868, 1085, 2170, 4340, 4909, 9818, 19636, 24545, 34363, 49090, 68726, 98180, 137452, 152179, 171815, 304358, 343630, 608716, 687260, 760895, 1065253, 1521790, 2130506, 3043580, 4261012, 5326265, 10652530, 21305060]

約数ペア:

[(1, 21305060), (2, 10652530), (4, 5326265), (5, 4261012), (7, 3043580), (10, 2130506), (14, 1521790), (20, 1065253), (28, 760895), (31, 687260), (35, 608716), (62, 343630), (70, 304358), (124, 171815), (140, 152179), (155, 137452), (217, 98180), (310, 68726), (434, 49090), (620, 34363), (868, 24545), (1085, 19636), (2170, 9818), (4340, 4909)]