20890521905

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{83}}^1\times {\mathrm{149}}^1\times {\mathrm{30713}}^1$

素因数の和:30961

約数の個数: 32

約数和(自身を含む): 27863740800

約数和(自身を除く): 6973218895

約数列:

[1, 5, 11, 55, 83, 149, 415, 745, 913, 1639, 4565, 8195, 12367, 30713, 61835, 136037, 153565, 337843, 680185, 1689215, 2549179, 4576237, 12745895, 22881185, 28040969, 50338607, 140204845, 251693035, 379827671, 1899138355, 4178104381, 20890521905]

約数ペア:

[(1, 20890521905), (5, 4178104381), (11, 1899138355), (55, 379827671), (83, 251693035), (149, 140204845), (415, 50338607), (745, 28040969), (913, 22881185), (1639, 12745895), (4565, 4576237), (8195, 2549179), (12367, 1689215), (30713, 680185), (61835, 337843), (136037, 153565)]