21678618255

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{421}}^1\times {\mathrm{593}}^1\times {\mathrm{827}}^1$

素因数の和:1856

約数の個数: 64

約数和(自身を含む): 39850195968

約数和(自身を除く): 18171577713

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 421, 593, 827, 1263, 1779, 2105, 2481, 2947, 2965, 4135, 4151, 5789, 6315, 8841, 8895, 12405, 12453, 14735, 17367, 20755, 28945, 44205, 62265, 86835, 249653, 348167, 490411, 748959, 1044501, 1248265, 1471233, 1740835, 1747571, 2437169, 2452055, 3432877, 3744795, 5222505, 5242713, 7311507, 7356165, 8737855, 10298631, 12185845, 17164385, 26213565, 36557535, 51493155, 206463031, 619389093, 1032315155, 1445241217, 3096945465, 4335723651, 7226206085, 21678618255]

約数ペア:

[(1, 21678618255), (3, 7226206085), (5, 4335723651), (7, 3096945465), (15, 1445241217), (21, 1032315155), (35, 619389093), (105, 206463031), (421, 51493155), (593, 36557535), (827, 26213565), (1263, 17164385), (1779, 12185845), (2105, 10298631), (2481, 8737855), (2947, 7356165), (2965, 7311507), (4135, 5242713), (4151, 5222505), (5789, 3744795), (6315, 3432877), (8841, 2452055), (8895, 2437169), (12405, 1747571), (12453, 1740835), (14735, 1471233), (17367, 1248265), (20755, 1044501), (28945, 748959), (44205, 490411), (62265, 348167), (86835, 249653)]