21857980

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{593}}^1$

素因数の和:718

約数の個数: 48

約数和(自身を含む): 48898080

約数和(自身を除く): 27040100

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 97, 190, 194, 380, 388, 485, 593, 970, 1186, 1843, 1940, 2372, 2965, 3686, 5930, 7372, 9215, 11267, 11860, 18430, 22534, 36860, 45068, 56335, 57521, 112670, 115042, 225340, 230084, 287605, 575210, 1092899, 1150420, 2185798, 4371596, 5464495, 10928990, 21857980]

約数ペア:

[(1, 21857980), (2, 10928990), (4, 5464495), (5, 4371596), (10, 2185798), (19, 1150420), (20, 1092899), (38, 575210), (76, 287605), (95, 230084), (97, 225340), (190, 115042), (194, 112670), (380, 57521), (388, 56335), (485, 45068), (593, 36860), (970, 22534), (1186, 18430), (1843, 11860), (1940, 11267), (2372, 9215), (2965, 7372), (3686, 5930)]