20009104

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{127}}^1\times {\mathrm{229}}^1$

素因数の和:407

約数の個数: 40

約数和(自身を含む): 40156160

約数和(自身を除く): 20147056

約数列:

[1, 2, 4, 8, 16, 43, 86, 127, 172, 229, 254, 344, 458, 508, 688, 916, 1016, 1832, 2032, 3664, 5461, 9847, 10922, 19694, 21844, 29083, 39388, 43688, 58166, 78776, 87376, 116332, 157552, 232664, 465328, 1250569, 2501138, 5002276, 10004552, 20009104]

約数ペア:

[(1, 20009104), (2, 10004552), (4, 5002276), (8, 2501138), (16, 1250569), (43, 465328), (86, 232664), (127, 157552), (172, 116332), (229, 87376), (254, 78776), (344, 58166), (458, 43688), (508, 39388), (688, 29083), (916, 21844), (1016, 19694), (1832, 10922), (2032, 9847), (3664, 5461)]