21232820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{4099}}^1$

素因数の和:4152

約数の個数: 48

約数和(自身を含む): 52348800

約数和(自身を除く): 31115980

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 37, 70, 74, 140, 148, 185, 259, 370, 518, 740, 1036, 1295, 2590, 4099, 5180, 8198, 16396, 20495, 28693, 40990, 57386, 81980, 114772, 143465, 151663, 286930, 303326, 573860, 606652, 758315, 1061641, 1516630, 2123282, 3033260, 4246564, 5308205, 10616410, 21232820]

約数ペア:

[(1, 21232820), (2, 10616410), (4, 5308205), (5, 4246564), (7, 3033260), (10, 2123282), (14, 1516630), (20, 1061641), (28, 758315), (35, 606652), (37, 573860), (70, 303326), (74, 286930), (140, 151663), (148, 143465), (185, 114772), (259, 81980), (370, 57386), (518, 40990), (740, 28693), (1036, 20495), (1295, 16396), (2590, 8198), (4099, 5180)]