81796820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{20147}}^1$

素因数の和:20192

約数の個数: 48

約数和(自身を含む): 203091840

約数和(自身を除く): 121295020

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 29, 35, 58, 70, 116, 140, 145, 203, 290, 406, 580, 812, 1015, 2030, 4060, 20147, 40294, 80588, 100735, 141029, 201470, 282058, 402940, 564116, 584263, 705145, 1168526, 1410290, 2337052, 2820580, 2921315, 4089841, 5842630, 8179682, 11685260, 16359364, 20449205, 40898410, 81796820]

約数ペア:

[(1, 81796820), (2, 40898410), (4, 20449205), (5, 16359364), (7, 11685260), (10, 8179682), (14, 5842630), (20, 4089841), (28, 2921315), (29, 2820580), (35, 2337052), (58, 1410290), (70, 1168526), (116, 705145), (140, 584263), (145, 564116), (203, 402940), (290, 282058), (406, 201470), (580, 141029), (812, 100735), (1015, 80588), (2030, 40294), (4060, 20147)]