20921697

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{1907}}^1$

素因数の和:1989

約数の個数: 24

約数和(自身を含む): 32145984

約数和(自身を除く): 11224287

約数列:

[1, 3, 9, 23, 53, 69, 159, 207, 477, 1219, 1907, 3657, 5721, 10971, 17163, 43861, 101071, 131583, 303213, 394749, 909639, 2324633, 6973899, 20921697]

約数ペア:

[(1, 20921697), (3, 6973899), (9, 2324633), (23, 909639), (53, 394749), (69, 303213), (159, 131583), (207, 101071), (477, 43861), (1219, 17163), (1907, 10971), (3657, 5721)]