20490990

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{52541}}^1$

素因数の和:52564

約数の個数: 32

約数和(自身を含む): 52962336

約数和(自身を除く): 32471346

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390, 52541, 105082, 157623, 262705, 315246, 525410, 683033, 788115, 1366066, 1576230, 2049099, 3415165, 4098198, 6830330, 10245495, 20490990]

約数ペア:

[(1, 20490990), (2, 10245495), (3, 6830330), (5, 4098198), (6, 3415165), (10, 2049099), (13, 1576230), (15, 1366066), (26, 788115), (30, 683033), (39, 525410), (65, 315246), (78, 262705), (130, 157623), (195, 105082), (390, 52541)]