21592780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{1609}}^1$

素因数の和:1690

約数の個数: 48

約数和(自身を含む): 50309280

約数和(自身を除く): 28716500

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 61, 110, 122, 220, 244, 305, 610, 671, 1220, 1342, 1609, 2684, 3218, 3355, 6436, 6710, 8045, 13420, 16090, 17699, 32180, 35398, 70796, 88495, 98149, 176990, 196298, 353980, 392596, 490745, 981490, 1079639, 1962980, 2159278, 4318556, 5398195, 10796390, 21592780]

約数ペア:

[(1, 21592780), (2, 10796390), (4, 5398195), (5, 4318556), (10, 2159278), (11, 1962980), (20, 1079639), (22, 981490), (44, 490745), (55, 392596), (61, 353980), (110, 196298), (122, 176990), (220, 98149), (244, 88495), (305, 70796), (610, 35398), (671, 32180), (1220, 17699), (1342, 16090), (1609, 13420), (2684, 8045), (3218, 6710), (3355, 6436)]