21651020

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{743}}^1$

素因数の和:830

約数の個数: 48

約数和(自身を含む): 47996928

約数和(自身を除く): 26345908

約数列:

[1, 2, 4, 5, 10, 20, 31, 47, 62, 94, 124, 155, 188, 235, 310, 470, 620, 743, 940, 1457, 1486, 2914, 2972, 3715, 5828, 7285, 7430, 14570, 14860, 23033, 29140, 34921, 46066, 69842, 92132, 115165, 139684, 174605, 230330, 349210, 460660, 698420, 1082551, 2165102, 4330204, 5412755, 10825510, 21651020]

約数ペア:

[(1, 21651020), (2, 10825510), (4, 5412755), (5, 4330204), (10, 2165102), (20, 1082551), (31, 698420), (47, 460660), (62, 349210), (94, 230330), (124, 174605), (155, 139684), (188, 115165), (235, 92132), (310, 69842), (470, 46066), (620, 34921), (743, 29140), (940, 23033), (1457, 14860), (1486, 14570), (2914, 7430), (2972, 7285), (3715, 5828)]