81333740

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{163}}^1\times {\mathrm{409}}^1$

素因数の和:642

約数の個数: 48

約数和(自身を含む): 175092960

約数和(自身を除く): 93759220

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 163, 244, 305, 326, 409, 610, 652, 815, 818, 1220, 1630, 1636, 2045, 3260, 4090, 8180, 9943, 19886, 24949, 39772, 49715, 49898, 66667, 99430, 99796, 124745, 133334, 198860, 249490, 266668, 333335, 498980, 666670, 1333340, 4066687, 8133374, 16266748, 20333435, 40666870, 81333740]

約数ペア:

[(1, 81333740), (2, 40666870), (4, 20333435), (5, 16266748), (10, 8133374), (20, 4066687), (61, 1333340), (122, 666670), (163, 498980), (244, 333335), (305, 266668), (326, 249490), (409, 198860), (610, 133334), (652, 124745), (815, 99796), (818, 99430), (1220, 66667), (1630, 49898), (1636, 49715), (2045, 39772), (3260, 24949), (4090, 19886), (8180, 9943)]