648272620

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{61}}^2\times {\mathrm{281}}^1$

素因数の和:443

約数の個数: 72

約数和(自身を含む): 1433787264

約数和(自身を除く): 785514644

約数列:

[1, 2, 4, 5, 10, 20, 31, 61, 62, 122, 124, 155, 244, 281, 305, 310, 562, 610, 620, 1124, 1220, 1405, 1891, 2810, 3721, 3782, 5620, 7442, 7564, 8711, 9455, 14884, 17141, 17422, 18605, 18910, 34282, 34844, 37210, 37820, 43555, 68564, 74420, 85705, 87110, 115351, 171410, 174220, 230702, 342820, 461404, 531371, 576755, 1045601, 1062742, 1153510, 2091202, 2125484, 2307020, 2656855, 4182404, 5228005, 5313710, 10456010, 10627420, 20912020, 32413631, 64827262, 129654524, 162068155, 324136310, 648272620]

約数ペア:

[(1, 648272620), (2, 324136310), (4, 162068155), (5, 129654524), (10, 64827262), (20, 32413631), (31, 20912020), (61, 10627420), (62, 10456010), (122, 5313710), (124, 5228005), (155, 4182404), (244, 2656855), (281, 2307020), (305, 2125484), (310, 2091202), (562, 1153510), (610, 1062742), (620, 1045601), (1124, 576755), (1220, 531371), (1405, 461404), (1891, 342820), (2810, 230702), (3721, 174220), (3782, 171410), (5620, 115351), (7442, 87110), (7564, 85705), (8711, 74420), (9455, 68564), (14884, 43555), (17141, 37820), (17422, 37210), (18605, 34844), (18910, 34282)]