18920209

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{229}}^1$

素因数の和:313

約数の個数: 32

約数和(自身を含む): 25171200

約数和(自身を除く): 6250991

約数列:

[1, 7, 11, 29, 37, 77, 203, 229, 259, 319, 407, 1073, 1603, 2233, 2519, 2849, 6641, 7511, 8473, 11803, 17633, 46487, 59311, 73051, 82621, 93203, 245717, 511357, 652421, 1720019, 2702887, 18920209]

約数ペア:

[(1, 18920209), (7, 2702887), (11, 1720019), (29, 652421), (37, 511357), (77, 245717), (203, 93203), (229, 82621), (259, 73051), (319, 59311), (407, 46487), (1073, 17633), (1603, 11803), (2233, 8473), (2519, 7511), (2849, 6641)]