21780456685

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{151}}^1\times {\mathrm{1181}}^1\times {\mathrm{1879}}^1$

素因数の和:3229

約数の個数: 32

約数和(自身を含む): 28372538880

約数和(自身を除く): 6592082195

約数列:

[1, 5, 13, 65, 151, 755, 1181, 1879, 1963, 5905, 9395, 9815, 15353, 24427, 76765, 122135, 178331, 283729, 891655, 1418645, 2219099, 2318303, 3688477, 11095495, 11591515, 18442385, 28848287, 144241435, 335083949, 1675419745, 4356091337, 21780456685]

約数ペア:

[(1, 21780456685), (5, 4356091337), (13, 1675419745), (65, 335083949), (151, 144241435), (755, 28848287), (1181, 18442385), (1879, 11591515), (1963, 11095495), (5905, 3688477), (9395, 2318303), (9815, 2219099), (15353, 1418645), (24427, 891655), (76765, 283729), (122135, 178331)]