642331625

素因数分解:

$5^3\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{311}}^1$

素因数の和:411

約数の個数: 64

約数和(自身を含む): 915812352

約数和(自身を除く): 273480727

約数列:

[1, 5, 13, 25, 31, 41, 65, 125, 155, 205, 311, 325, 403, 533, 775, 1025, 1271, 1555, 1625, 2015, 2665, 3875, 4043, 5125, 6355, 7775, 9641, 10075, 12751, 13325, 16523, 20215, 31775, 38875, 48205, 50375, 63755, 66625, 82615, 101075, 125333, 158875, 165763, 241025, 318775, 395281, 413075, 505375, 626665, 828815, 1205125, 1593875, 1976405, 2065375, 3133325, 4144075, 5138653, 9882025, 15666625, 20720375, 25693265, 49410125, 128466325, 642331625]

約数ペア:

[(1, 642331625), (5, 128466325), (13, 49410125), (25, 25693265), (31, 20720375), (41, 15666625), (65, 9882025), (125, 5138653), (155, 4144075), (205, 3133325), (311, 2065375), (325, 1976405), (403, 1593875), (533, 1205125), (775, 828815), (1025, 626665), (1271, 505375), (1555, 413075), (1625, 395281), (2015, 318775), (2665, 241025), (3875, 165763), (4043, 158875), (5125, 125333), (6355, 101075), (7775, 82615), (9641, 66625), (10075, 63755), (12751, 50375), (13325, 48205), (16523, 38875), (20215, 31775)]