19945400

素因数分解:

$2^3\times 5^2\times {\mathrm{31}}^1\times {\mathrm{3217}}^1$

素因数の和:3264

約数の個数: 48

約数和(自身を含む): 47883840

約数和(自身を除く): 27938440

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 31, 40, 50, 62, 100, 124, 155, 200, 248, 310, 620, 775, 1240, 1550, 3100, 3217, 6200, 6434, 12868, 16085, 25736, 32170, 64340, 80425, 99727, 128680, 160850, 199454, 321700, 398908, 498635, 643400, 797816, 997270, 1994540, 2493175, 3989080, 4986350, 9972700, 19945400]

約数ペア:

[(1, 19945400), (2, 9972700), (4, 4986350), (5, 3989080), (8, 2493175), (10, 1994540), (20, 997270), (25, 797816), (31, 643400), (40, 498635), (50, 398908), (62, 321700), (100, 199454), (124, 160850), (155, 128680), (200, 99727), (248, 80425), (310, 64340), (620, 32170), (775, 25736), (1240, 16085), (1550, 12868), (3100, 6434), (3217, 6200)]