20700020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{2543}}^1$

素因数の和:2600

約数の個数: 48

約数和(自身を含む): 48722688

約数和(自身を除く): 28022668

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 37, 44, 55, 74, 110, 148, 185, 220, 370, 407, 740, 814, 1628, 2035, 2543, 4070, 5086, 8140, 10172, 12715, 25430, 27973, 50860, 55946, 94091, 111892, 139865, 188182, 279730, 376364, 470455, 559460, 940910, 1035001, 1881820, 2070002, 4140004, 5175005, 10350010, 20700020]

約数ペア:

[(1, 20700020), (2, 10350010), (4, 5175005), (5, 4140004), (10, 2070002), (11, 1881820), (20, 1035001), (22, 940910), (37, 559460), (44, 470455), (55, 376364), (74, 279730), (110, 188182), (148, 139865), (185, 111892), (220, 94091), (370, 55946), (407, 50860), (740, 27973), (814, 25430), (1628, 12715), (2035, 10172), (2543, 8140), (4070, 5086)]