21060990

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{241}}^1\times {\mathrm{971}}^1$

素因数の和:1225

約数の個数: 48

約数和(自身を含む): 55042416

約数和(自身を除く): 33981426

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 241, 482, 723, 971, 1205, 1446, 1942, 2169, 2410, 2913, 3615, 4338, 4855, 5826, 7230, 8739, 9710, 10845, 14565, 17478, 21690, 29130, 43695, 87390, 234011, 468022, 702033, 1170055, 1404066, 2106099, 2340110, 3510165, 4212198, 7020330, 10530495, 21060990]

約数ペア:

[(1, 21060990), (2, 10530495), (3, 7020330), (5, 4212198), (6, 3510165), (9, 2340110), (10, 2106099), (15, 1404066), (18, 1170055), (30, 702033), (45, 468022), (90, 234011), (241, 87390), (482, 43695), (723, 29130), (971, 21690), (1205, 17478), (1446, 14565), (1942, 10845), (2169, 9710), (2410, 8739), (2913, 7230), (3615, 5826), (4338, 4855)]