21509900

素因数分解:

$2^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{11321}}^1$

素因数の和:11354

約数の個数: 36

約数和(自身を含む): 49137480

約数和(自身を除く): 27627580

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 50, 76, 95, 100, 190, 380, 475, 950, 1900, 11321, 22642, 45284, 56605, 113210, 215099, 226420, 283025, 430198, 566050, 860396, 1075495, 1132100, 2150990, 4301980, 5377475, 10754950, 21509900]

約数ペア:

[(1, 21509900), (2, 10754950), (4, 5377475), (5, 4301980), (10, 2150990), (19, 1132100), (20, 1075495), (25, 860396), (38, 566050), (50, 430198), (76, 283025), (95, 226420), (100, 215099), (190, 113210), (380, 56605), (475, 45284), (950, 22642), (1900, 11321)]