21985509

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{2777}}^1$

素因数の和:2829

約数の個数: 32

約数和(自身を含む): 37336320

約数和(自身を除く): 15350811

約数列:

[1, 3, 7, 13, 21, 29, 39, 87, 91, 203, 273, 377, 609, 1131, 2639, 2777, 7917, 8331, 19439, 36101, 58317, 80533, 108303, 241599, 252707, 563731, 758121, 1046929, 1691193, 3140787, 7328503, 21985509]

約数ペア:

[(1, 21985509), (3, 7328503), (7, 3140787), (13, 1691193), (21, 1046929), (29, 758121), (39, 563731), (87, 252707), (91, 241599), (203, 108303), (273, 80533), (377, 58317), (609, 36101), (1131, 19439), (2639, 8331), (2777, 7917)]