21831745

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{107}}^1$

素因数の和:241

約数の個数: 32

約数和(自身を含む): 29538432

約数和(自身を除く): 7706687

約数列:

[1, 5, 13, 43, 65, 73, 107, 215, 365, 535, 559, 949, 1391, 2795, 3139, 4601, 4745, 6955, 7811, 15695, 23005, 39055, 40807, 59813, 101543, 204035, 299065, 335873, 507715, 1679365, 4366349, 21831745]

約数ペア:

[(1, 21831745), (5, 4366349), (13, 1679365), (43, 507715), (65, 335873), (73, 299065), (107, 204035), (215, 101543), (365, 59813), (535, 40807), (559, 39055), (949, 23005), (1391, 15695), (2795, 7811), (3139, 6955), (4601, 4745)]