389333720

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{159563}}^1$

素因数の和:159635

約数の個数: 32

約数和(自身を含む): 890367120

約数和(自身を除く): 501033400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 159563, 319126, 638252, 797815, 1276504, 1595630, 3191260, 6382520, 9733343, 19466686, 38933372, 48666715, 77866744, 97333430, 194666860, 389333720]

約数ペア:

[(1, 389333720), (2, 194666860), (4, 97333430), (5, 77866744), (8, 48666715), (10, 38933372), (20, 19466686), (40, 9733343), (61, 6382520), (122, 3191260), (244, 1595630), (305, 1276504), (488, 797815), (610, 638252), (1220, 319126), (2440, 159563)]