21162440

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{40697}}^1$

素因数の和:40721

約数の個数: 32

約数和(自身を含む): 51279480

約数和(自身を除く): 30117040

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 40697, 81394, 162788, 203485, 325576, 406970, 529061, 813940, 1058122, 1627880, 2116244, 2645305, 4232488, 5290610, 10581220, 21162440]

約数ペア:

[(1, 21162440), (2, 10581220), (4, 5290610), (5, 4232488), (8, 2645305), (10, 2116244), (13, 1627880), (20, 1058122), (26, 813940), (40, 529061), (52, 406970), (65, 325576), (104, 203485), (130, 162788), (260, 81394), (520, 40697)]