388981780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{22381}}^1$

素因数の和:22480

約数の個数: 48

約数和(自身を含む): 902442240

約数和(自身を除く): 513460460

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 79, 110, 158, 220, 316, 395, 790, 869, 1580, 1738, 3476, 4345, 8690, 17380, 22381, 44762, 89524, 111905, 223810, 246191, 447620, 492382, 984764, 1230955, 1768099, 2461910, 3536198, 4923820, 7072396, 8840495, 17680990, 19449089, 35361980, 38898178, 77796356, 97245445, 194490890, 388981780]

約数ペア:

[(1, 388981780), (2, 194490890), (4, 97245445), (5, 77796356), (10, 38898178), (11, 35361980), (20, 19449089), (22, 17680990), (44, 8840495), (55, 7072396), (79, 4923820), (110, 3536198), (158, 2461910), (220, 1768099), (316, 1230955), (395, 984764), (790, 492382), (869, 447620), (1580, 246191), (1738, 223810), (3476, 111905), (4345, 89524), (8690, 44762), (17380, 22381)]