18956240

素因数分解:

$2^4\times 5^1\times {\mathrm{211}}^1\times {\mathrm{1123}}^1$

素因数の和:1347

約数の個数: 40

約数和(自身を含む): 44321568

約数和(自身を除く): 25365328

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 211, 422, 844, 1055, 1123, 1688, 2110, 2246, 3376, 4220, 4492, 5615, 8440, 8984, 11230, 16880, 17968, 22460, 44920, 89840, 236953, 473906, 947812, 1184765, 1895624, 2369530, 3791248, 4739060, 9478120, 18956240]

約数ペア:

[(1, 18956240), (2, 9478120), (4, 4739060), (5, 3791248), (8, 2369530), (10, 1895624), (16, 1184765), (20, 947812), (40, 473906), (80, 236953), (211, 89840), (422, 44920), (844, 22460), (1055, 17968), (1123, 16880), (1688, 11230), (2110, 8984), (2246, 8440), (3376, 5615), (4220, 4492)]