81396640

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{39133}}^1$

素因数の和:39161

約数の個数: 48

約数和(自身を含む): 207097128

約数和(自身を除く): 125700488

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 104, 130, 160, 208, 260, 416, 520, 1040, 2080, 39133, 78266, 156532, 195665, 313064, 391330, 508729, 626128, 782660, 1017458, 1252256, 1565320, 2034916, 2543645, 3130640, 4069832, 5087290, 6261280, 8139664, 10174580, 16279328, 20349160, 40698320, 81396640]

約数ペア:

[(1, 81396640), (2, 40698320), (4, 20349160), (5, 16279328), (8, 10174580), (10, 8139664), (13, 6261280), (16, 5087290), (20, 4069832), (26, 3130640), (32, 2543645), (40, 2034916), (52, 1565320), (65, 1252256), (80, 1017458), (104, 782660), (130, 626128), (160, 508729), (208, 391330), (260, 313064), (416, 195665), (520, 156532), (1040, 78266), (2080, 39133)]