640476645

素因数分解:

$3^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{181}}^1\times {\mathrm{4451}}^1$

素因数の和:4693

約数の個数: 32

約数和(自身を含む): 1050102144

約数和(自身を除く): 409625499

約数列:

[1, 3, 5, 15, 53, 159, 181, 265, 543, 795, 905, 2715, 4451, 9593, 13353, 22255, 28779, 47965, 66765, 143895, 235903, 707709, 805631, 1179515, 2416893, 3538545, 4028155, 12084465, 42698443, 128095329, 213492215, 640476645]

約数ペア:

[(1, 640476645), (3, 213492215), (5, 128095329), (15, 42698443), (53, 12084465), (159, 4028155), (181, 3538545), (265, 2416893), (543, 1179515), (795, 805631), (905, 707709), (2715, 235903), (4451, 143895), (9593, 66765), (13353, 47965), (22255, 28779)]