20653040

素因数分解:

$2^4\times 5^1\times {\mathrm{53}}^1\times {\mathrm{4871}}^1$

素因数の和:4937

約数の個数: 40

約数和(自身を含む): 48934368

約数和(自身を除く): 28281328

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 53, 80, 106, 212, 265, 424, 530, 848, 1060, 2120, 4240, 4871, 9742, 19484, 24355, 38968, 48710, 77936, 97420, 194840, 258163, 389680, 516326, 1032652, 1290815, 2065304, 2581630, 4130608, 5163260, 10326520, 20653040]

約数ペア:

[(1, 20653040), (2, 10326520), (4, 5163260), (5, 4130608), (8, 2581630), (10, 2065304), (16, 1290815), (20, 1032652), (40, 516326), (53, 389680), (80, 258163), (106, 194840), (212, 97420), (265, 77936), (424, 48710), (530, 38968), (848, 24355), (1060, 19484), (2120, 9742), (4240, 4871)]