205791640

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{165961}}^1$

素因数の和:166003

約数の個数: 32

約数和(自身を含む): 477970560

約数和(自身を除く): 272178920

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 165961, 331922, 663844, 829805, 1327688, 1659610, 3319220, 5144791, 6638440, 10289582, 20579164, 25723955, 41158328, 51447910, 102895820, 205791640]

約数ペア:

[(1, 205791640), (2, 102895820), (4, 51447910), (5, 41158328), (8, 25723955), (10, 20579164), (20, 10289582), (31, 6638440), (40, 5144791), (62, 3319220), (124, 1659610), (155, 1327688), (248, 829805), (310, 663844), (620, 331922), (1240, 165961)]