21019020

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31847}}^1$

素因数の和:31870

約数の個数: 48

約数和(自身を含む): 64205568

約数和(自身を除く): 43186548

約数列:

[1, 2, 3, 4, 5, 6, 10, 11, 12, 15, 20, 22, 30, 33, 44, 55, 60, 66, 110, 132, 165, 220, 330, 660, 31847, 63694, 95541, 127388, 159235, 191082, 318470, 350317, 382164, 477705, 636940, 700634, 955410, 1050951, 1401268, 1751585, 1910820, 2101902, 3503170, 4203804, 5254755, 7006340, 10509510, 21019020]

約数ペア:

[(1, 21019020), (2, 10509510), (3, 7006340), (4, 5254755), (5, 4203804), (6, 3503170), (10, 2101902), (11, 1910820), (12, 1751585), (15, 1401268), (20, 1050951), (22, 955410), (30, 700634), (33, 636940), (44, 477705), (55, 382164), (60, 350317), (66, 318470), (110, 191082), (132, 159235), (165, 127388), (220, 95541), (330, 63694), (660, 31847)]