21031120

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23899}}^1$

素因数の和:23923

約数の個数: 40

約数和(自身を含む): 53344800

約数和(自身を除く): 32313680

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 23899, 47798, 95596, 119495, 191192, 238990, 262889, 382384, 477980, 525778, 955960, 1051556, 1314445, 1911920, 2103112, 2628890, 4206224, 5257780, 10515560, 21031120]

約数ペア:

[(1, 21031120), (2, 10515560), (4, 5257780), (5, 4206224), (8, 2628890), (10, 2103112), (11, 1911920), (16, 1314445), (20, 1051556), (22, 955960), (40, 525778), (44, 477980), (55, 382384), (80, 262889), (88, 238990), (110, 191192), (176, 119495), (220, 95596), (440, 47798), (880, 23899)]