21954205

素因数分解:

$5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{113}}^1$

素因数の和:206

約数の個数: 48

約数和(自身を含む): 33841584

約数和(自身を除く): 11887379

約数列:

[1, 5, 7, 13, 35, 49, 61, 65, 91, 113, 245, 305, 427, 455, 565, 637, 791, 793, 1469, 2135, 2989, 3185, 3955, 3965, 5537, 5551, 6893, 7345, 10283, 14945, 27685, 27755, 34465, 38857, 48251, 51415, 71981, 89609, 194285, 241255, 337757, 359905, 448045, 627263, 1688785, 3136315, 4390841, 21954205]

約数ペア:

[(1, 21954205), (5, 4390841), (7, 3136315), (13, 1688785), (35, 627263), (49, 448045), (61, 359905), (65, 337757), (91, 241255), (113, 194285), (245, 89609), (305, 71981), (427, 51415), (455, 48251), (565, 38857), (637, 34465), (791, 27755), (793, 27685), (1469, 14945), (2135, 10283), (2989, 7345), (3185, 6893), (3955, 5551), (3965, 5537)]