64617640

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^2\times {\mathrm{41}}^2$

素因数の和:155

約数の個数: 72

約数和(自身を含む): 153984510

約数和(自身を除く): 89366870

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 41, 62, 82, 124, 155, 164, 205, 248, 310, 328, 410, 620, 820, 961, 1240, 1271, 1640, 1681, 1922, 2542, 3362, 3844, 4805, 5084, 6355, 6724, 7688, 8405, 9610, 10168, 12710, 13448, 16810, 19220, 25420, 33620, 38440, 39401, 50840, 52111, 67240, 78802, 104222, 157604, 197005, 208444, 260555, 315208, 394010, 416888, 521110, 788020, 1042220, 1576040, 1615441, 2084440, 3230882, 6461764, 8077205, 12923528, 16154410, 32308820, 64617640]

約数ペア:

[(1, 64617640), (2, 32308820), (4, 16154410), (5, 12923528), (8, 8077205), (10, 6461764), (20, 3230882), (31, 2084440), (40, 1615441), (41, 1576040), (62, 1042220), (82, 788020), (124, 521110), (155, 416888), (164, 394010), (205, 315208), (248, 260555), (310, 208444), (328, 197005), (410, 157604), (620, 104222), (820, 78802), (961, 67240), (1240, 52111), (1271, 50840), (1640, 39401), (1681, 38440), (1922, 33620), (2542, 25420), (3362, 19220), (3844, 16810), (4805, 13448), (5084, 12710), (6355, 10168), (6724, 9610), (7688, 8405)]