261445820

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{157}}^1\times {\mathrm{1571}}^1$

素因数の和:1790

約数の個数: 48

約数和(自身を含む): 563316768

約数和(自身を除く): 301870948

約数列:

[1, 2, 4, 5, 10, 20, 53, 106, 157, 212, 265, 314, 530, 628, 785, 1060, 1570, 1571, 3140, 3142, 6284, 7855, 8321, 15710, 16642, 31420, 33284, 41605, 83210, 83263, 166420, 166526, 246647, 333052, 416315, 493294, 832630, 986588, 1233235, 1665260, 2466470, 4932940, 13072291, 26144582, 52289164, 65361455, 130722910, 261445820]

約数ペア:

[(1, 261445820), (2, 130722910), (4, 65361455), (5, 52289164), (10, 26144582), (20, 13072291), (53, 4932940), (106, 2466470), (157, 1665260), (212, 1233235), (265, 986588), (314, 832630), (530, 493294), (628, 416315), (785, 333052), (1060, 246647), (1570, 166526), (1571, 166420), (3140, 83263), (3142, 83210), (6284, 41605), (7855, 33284), (8321, 31420), (15710, 16642)]