21630505

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{109}}^1$

素因数の和:241

約数の個数: 32

約数和(自身を含む): 29272320

約数和(自身を除く): 7641815

約数列:

[1, 5, 13, 43, 65, 71, 109, 215, 355, 545, 559, 923, 1417, 2795, 3053, 4615, 4687, 7085, 7739, 15265, 23435, 38695, 39689, 60931, 100607, 198445, 304655, 332777, 503035, 1663885, 4326101, 21630505]

約数ペア:

[(1, 21630505), (5, 4326101), (13, 1663885), (43, 503035), (65, 332777), (71, 304655), (109, 198445), (215, 100607), (355, 60931), (545, 39689), (559, 38695), (923, 23435), (1417, 15265), (2795, 7739), (3053, 7085), (4615, 4687)]