21857660

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{1361}}^1$

素因数の和:1454

約数の個数: 48

約数和(自身を含む): 50797152

約数和(自身を除く): 28939492

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 73, 110, 146, 220, 292, 365, 730, 803, 1361, 1460, 1606, 2722, 3212, 4015, 5444, 6805, 8030, 13610, 14971, 16060, 27220, 29942, 59884, 74855, 99353, 149710, 198706, 299420, 397412, 496765, 993530, 1092883, 1987060, 2185766, 4371532, 5464415, 10928830, 21857660]

約数ペア:

[(1, 21857660), (2, 10928830), (4, 5464415), (5, 4371532), (10, 2185766), (11, 1987060), (20, 1092883), (22, 993530), (44, 496765), (55, 397412), (73, 299420), (110, 198706), (146, 149710), (220, 99353), (292, 74855), (365, 59884), (730, 29942), (803, 27220), (1361, 16060), (1460, 14971), (1606, 13610), (2722, 8030), (3212, 6805), (4015, 5444)]