18901238

素因数分解:

$2^1\times {\mathrm{19}}^2\times {\mathrm{47}}^1\times {\mathrm{557}}^1$

素因数の和:644

約数の個数: 24

約数和(自身を含む): 30614112

約数和(自身を除く): 11712874

約数列:

[1, 2, 19, 38, 47, 94, 361, 557, 722, 893, 1114, 1786, 10583, 16967, 21166, 26179, 33934, 52358, 201077, 402154, 497401, 994802, 9450619, 18901238]

約数ペア:

[(1, 18901238), (2, 9450619), (19, 994802), (38, 497401), (47, 402154), (94, 201077), (361, 52358), (557, 33934), (722, 26179), (893, 21166), (1114, 16967), (1786, 10583)]