21499775

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{2113}}^1$

素因数の和:2171

約数の個数: 24

約数和(自身を含む): 29883504

約数和(自身を除く): 8383729

約数列:

[1, 5, 11, 25, 37, 55, 185, 275, 407, 925, 2035, 2113, 10175, 10565, 23243, 52825, 78181, 116215, 390905, 581075, 859991, 1954525, 4299955, 21499775]

約数ペア:

[(1, 21499775), (5, 4299955), (11, 1954525), (25, 859991), (37, 581075), (55, 390905), (185, 116215), (275, 78181), (407, 52825), (925, 23243), (2035, 10565), (2113, 10175)]