20218572040

素因数分解:

$2^3\times 5^1\times {\mathrm{431}}^1\times {\mathrm{521}}^1\times {\mathrm{2251}}^1$

素因数の和:3214

約数の個数: 64

約数和(自身を含む): 45705150720

約数和(自身を除く): 25486578680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 431, 521, 862, 1042, 1724, 2084, 2155, 2251, 2605, 3448, 4168, 4310, 4502, 5210, 8620, 9004, 10420, 11255, 17240, 18008, 20840, 22510, 45020, 90040, 224551, 449102, 898204, 970181, 1122755, 1172771, 1796408, 1940362, 2245510, 2345542, 3880724, 4491020, 4691084, 4850905, 5863855, 7761448, 8982040, 9382168, 9701810, 11727710, 19403620, 23455420, 38807240, 46910840, 505464301, 1010928602, 2021857204, 2527321505, 4043714408, 5054643010, 10109286020, 20218572040]

約数ペア:

[(1, 20218572040), (2, 10109286020), (4, 5054643010), (5, 4043714408), (8, 2527321505), (10, 2021857204), (20, 1010928602), (40, 505464301), (431, 46910840), (521, 38807240), (862, 23455420), (1042, 19403620), (1724, 11727710), (2084, 9701810), (2155, 9382168), (2251, 8982040), (2605, 7761448), (3448, 5863855), (4168, 4850905), (4310, 4691084), (4502, 4491020), (5210, 3880724), (8620, 2345542), (9004, 2245510), (10420, 1940362), (11255, 1796408), (17240, 1172771), (18008, 1122755), (20840, 970181), (22510, 898204), (45020, 449102), (90040, 224551)]