20160500

素因数分解:

$2^2\times 5^3\times {\mathrm{61}}^1\times {\mathrm{661}}^1$

素因数の和:741

約数の個数: 48

約数和(自身を含む): 44820048

約数和(自身を除く): 24659548

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 61, 100, 122, 125, 244, 250, 305, 500, 610, 661, 1220, 1322, 1525, 2644, 3050, 3305, 6100, 6610, 7625, 13220, 15250, 16525, 30500, 33050, 40321, 66100, 80642, 82625, 161284, 165250, 201605, 330500, 403210, 806420, 1008025, 2016050, 4032100, 5040125, 10080250, 20160500]

約数ペア:

[(1, 20160500), (2, 10080250), (4, 5040125), (5, 4032100), (10, 2016050), (20, 1008025), (25, 806420), (50, 403210), (61, 330500), (100, 201605), (122, 165250), (125, 161284), (244, 82625), (250, 80642), (305, 66100), (500, 40321), (610, 33050), (661, 30500), (1220, 16525), (1322, 15250), (1525, 13220), (2644, 7625), (3050, 6610), (3305, 6100)]