21189090

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{54331}}^1$

素因数の和:54354

約数の個数: 32

約数和(自身を含む): 54766656

約数和(自身を除く): 33577566

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390, 54331, 108662, 162993, 271655, 325986, 543310, 706303, 814965, 1412606, 1629930, 2118909, 3531515, 4237818, 7063030, 10594545, 21189090]

約数ペア:

[(1, 21189090), (2, 10594545), (3, 7063030), (5, 4237818), (6, 3531515), (10, 2118909), (13, 1629930), (15, 1412606), (26, 814965), (30, 706303), (39, 543310), (65, 325986), (78, 271655), (130, 162993), (195, 108662), (390, 54331)]