21177940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{6577}}^1$

素因数の和:6616

約数の個数: 48

約数和(自身を含む): 53044992

約数和(自身を除く): 31867052

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 70, 92, 115, 140, 161, 230, 322, 460, 644, 805, 1610, 3220, 6577, 13154, 26308, 32885, 46039, 65770, 92078, 131540, 151271, 184156, 230195, 302542, 460390, 605084, 756355, 920780, 1058897, 1512710, 2117794, 3025420, 4235588, 5294485, 10588970, 21177940]

約数ペア:

[(1, 21177940), (2, 10588970), (4, 5294485), (5, 4235588), (7, 3025420), (10, 2117794), (14, 1512710), (20, 1058897), (23, 920780), (28, 756355), (35, 605084), (46, 460390), (70, 302542), (92, 230195), (115, 184156), (140, 151271), (161, 131540), (230, 92078), (322, 65770), (460, 46039), (644, 32885), (805, 26308), (1610, 13154), (3220, 6577)]