18741640

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{7681}}^1$

素因数の和:7753

約数の個数: 32

約数和(自身を含む): 42865560

約数和(自身を除く): 24123920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 7681, 15362, 30724, 38405, 61448, 76810, 153620, 307240, 468541, 937082, 1874164, 2342705, 3748328, 4685410, 9370820, 18741640]

約数ペア:

[(1, 18741640), (2, 9370820), (4, 4685410), (5, 3748328), (8, 2342705), (10, 1874164), (20, 937082), (40, 468541), (61, 307240), (122, 153620), (244, 76810), (305, 61448), (488, 38405), (610, 30724), (1220, 15362), (2440, 7681)]