21232840

素因数分解:

$2^3\times 5^1\times {\mathrm{557}}^1\times {\mathrm{953}}^1$

素因数の和:1521

約数の個数: 32

約数和(自身を含む): 47909880

約数和(自身を除く): 26677040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 557, 953, 1114, 1906, 2228, 2785, 3812, 4456, 4765, 5570, 7624, 9530, 11140, 19060, 22280, 38120, 530821, 1061642, 2123284, 2654105, 4246568, 5308210, 10616420, 21232840]

約数ペア:

[(1, 21232840), (2, 10616420), (4, 5308210), (5, 4246568), (8, 2654105), (10, 2123284), (20, 1061642), (40, 530821), (557, 38120), (953, 22280), (1114, 19060), (1906, 11140), (2228, 9530), (2785, 7624), (3812, 5570), (4456, 4765)]