21219500

素因数分解:

$2^2\times 5^3\times {\mathrm{31}}^1\times {\mathrm{37}}^2$

素因数の和:124

約数の個数: 72

約数和(自身を含む): 49166208

約数和(自身を除く): 27946708

約数列:

[1, 2, 4, 5, 10, 20, 25, 31, 37, 50, 62, 74, 100, 124, 125, 148, 155, 185, 250, 310, 370, 500, 620, 740, 775, 925, 1147, 1369, 1550, 1850, 2294, 2738, 3100, 3700, 3875, 4588, 4625, 5476, 5735, 6845, 7750, 9250, 11470, 13690, 15500, 18500, 22940, 27380, 28675, 34225, 42439, 57350, 68450, 84878, 114700, 136900, 143375, 169756, 171125, 212195, 286750, 342250, 424390, 573500, 684500, 848780, 1060975, 2121950, 4243900, 5304875, 10609750, 21219500]

約数ペア:

[(1, 21219500), (2, 10609750), (4, 5304875), (5, 4243900), (10, 2121950), (20, 1060975), (25, 848780), (31, 684500), (37, 573500), (50, 424390), (62, 342250), (74, 286750), (100, 212195), (124, 171125), (125, 169756), (148, 143375), (155, 136900), (185, 114700), (250, 84878), (310, 68450), (370, 57350), (500, 42439), (620, 34225), (740, 28675), (775, 27380), (925, 22940), (1147, 18500), (1369, 15500), (1550, 13690), (1850, 11470), (2294, 9250), (2738, 7750), (3100, 6845), (3700, 5735), (3875, 5476), (4588, 4625)]