18383620

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{149}}^1\times {\mathrm{199}}^1$

素因数の和:388

約数の個数: 48

約数和(自身を含む): 40320000

約数和(自身を除く): 21936380

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 149, 155, 199, 298, 310, 398, 596, 620, 745, 796, 995, 1490, 1990, 2980, 3980, 4619, 6169, 9238, 12338, 18476, 23095, 24676, 29651, 30845, 46190, 59302, 61690, 92380, 118604, 123380, 148255, 296510, 593020, 919181, 1838362, 3676724, 4595905, 9191810, 18383620]

約数ペア:

[(1, 18383620), (2, 9191810), (4, 4595905), (5, 3676724), (10, 1838362), (20, 919181), (31, 593020), (62, 296510), (124, 148255), (149, 123380), (155, 118604), (199, 92380), (298, 61690), (310, 59302), (398, 46190), (596, 30845), (620, 29651), (745, 24676), (796, 23095), (995, 18476), (1490, 12338), (1990, 9238), (2980, 6169), (3980, 4619)]