21861800

素因数分解:

$2^3\times 5^2\times {\mathrm{281}}^1\times {\mathrm{389}}^1$

素因数の和:686

約数の個数: 48

約数和(自身を含む): 51140700

約数和(自身を除く): 29278900

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 281, 389, 562, 778, 1124, 1405, 1556, 1945, 2248, 2810, 3112, 3890, 5620, 7025, 7780, 9725, 11240, 14050, 15560, 19450, 28100, 38900, 56200, 77800, 109309, 218618, 437236, 546545, 874472, 1093090, 2186180, 2732725, 4372360, 5465450, 10930900, 21861800]

約数ペア:

[(1, 21861800), (2, 10930900), (4, 5465450), (5, 4372360), (8, 2732725), (10, 2186180), (20, 1093090), (25, 874472), (40, 546545), (50, 437236), (100, 218618), (200, 109309), (281, 77800), (389, 56200), (562, 38900), (778, 28100), (1124, 19450), (1405, 15560), (1556, 14050), (1945, 11240), (2248, 9725), (2810, 7780), (3112, 7025), (3890, 5620)]