21551265

素因数分解:

$3^4\times 5^1\times {\mathrm{127}}^1\times {\mathrm{419}}^1$

素因数の和:563

約数の個数: 40

約数和(自身を含む): 39029760

約数和(自身を除く): 17478495

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 127, 135, 381, 405, 419, 635, 1143, 1257, 1905, 2095, 3429, 3771, 5715, 6285, 10287, 11313, 17145, 18855, 33939, 51435, 53213, 56565, 159639, 169695, 266065, 478917, 798195, 1436751, 2394585, 4310253, 7183755, 21551265]

約数ペア:

[(1, 21551265), (3, 7183755), (5, 4310253), (9, 2394585), (15, 1436751), (27, 798195), (45, 478917), (81, 266065), (127, 169695), (135, 159639), (381, 56565), (405, 53213), (419, 51435), (635, 33939), (1143, 18855), (1257, 17145), (1905, 11313), (2095, 10287), (3429, 6285), (3771, 5715)]