19765820

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{53}}^1\times {\mathrm{643}}^1$

素因数の和:734

約数の個数: 48

約数和(自身を含む): 43817760

約数和(自身を除く): 24051940

約数列:

[1, 2, 4, 5, 10, 20, 29, 53, 58, 106, 116, 145, 212, 265, 290, 530, 580, 643, 1060, 1286, 1537, 2572, 3074, 3215, 6148, 6430, 7685, 12860, 15370, 18647, 30740, 34079, 37294, 68158, 74588, 93235, 136316, 170395, 186470, 340790, 372940, 681580, 988291, 1976582, 3953164, 4941455, 9882910, 19765820]

約数ペア:

[(1, 19765820), (2, 9882910), (4, 4941455), (5, 3953164), (10, 1976582), (20, 988291), (29, 681580), (53, 372940), (58, 340790), (106, 186470), (116, 170395), (145, 136316), (212, 93235), (265, 74588), (290, 68158), (530, 37294), (580, 34079), (643, 30740), (1060, 18647), (1286, 15370), (1537, 12860), (2572, 7685), (3074, 6430), (3215, 6148)]