20512692040

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{8406841}}^1$

素因数の和:8406913

約数の個数: 32

約数和(自身を含む): 46910178360

約数和(自身を除く): 26397486320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 8406841, 16813682, 33627364, 42034205, 67254728, 84068410, 168136820, 336273640, 512817301, 1025634602, 2051269204, 2564086505, 4102538408, 5128173010, 10256346020, 20512692040]

約数ペア:

[(1, 20512692040), (2, 10256346020), (4, 5128173010), (5, 4102538408), (8, 2564086505), (10, 2051269204), (20, 1025634602), (40, 512817301), (61, 336273640), (122, 168136820), (244, 84068410), (305, 67254728), (488, 42034205), (610, 33627364), (1220, 16813682), (2440, 8406841)]