64992534980

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{991}}^1\times {\mathrm{79979}}^1$

素因数の和:81020

約数の個数: 48

約数和(自身を含む): 139956042240

約数和(自身を除く): 74963507260

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 991, 1982, 3964, 4955, 9910, 19820, 40631, 79979, 81262, 159958, 162524, 203155, 319916, 399895, 406310, 799790, 812620, 1599580, 3279139, 6558278, 13116556, 16395695, 32791390, 65582780, 79259189, 158518378, 317036756, 396295945, 792591890, 1585183780, 3249626749, 6499253498, 12998506996, 16248133745, 32496267490, 64992534980]

約数ペア:

[(1, 64992534980), (2, 32496267490), (4, 16248133745), (5, 12998506996), (10, 6499253498), (20, 3249626749), (41, 1585183780), (82, 792591890), (164, 396295945), (205, 317036756), (410, 158518378), (820, 79259189), (991, 65582780), (1982, 32791390), (3964, 16395695), (4955, 13116556), (9910, 6558278), (19820, 3279139), (40631, 1599580), (79979, 812620), (81262, 799790), (159958, 406310), (162524, 399895), (203155, 319916)]