21903920

素因数分解:

$2^4\times 5^1\times {\mathrm{113}}^1\times {\mathrm{2423}}^1$

素因数の和:2549

約数の個数: 40

約数和(自身を含む): 51398496

約数和(自身を除く): 29494576

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 113, 226, 452, 565, 904, 1130, 1808, 2260, 2423, 4520, 4846, 9040, 9692, 12115, 19384, 24230, 38768, 48460, 96920, 193840, 273799, 547598, 1095196, 1368995, 2190392, 2737990, 4380784, 5475980, 10951960, 21903920]

約数ペア:

[(1, 21903920), (2, 10951960), (4, 5475980), (5, 4380784), (8, 2737990), (10, 2190392), (16, 1368995), (20, 1095196), (40, 547598), (80, 273799), (113, 193840), (226, 96920), (452, 48460), (565, 38768), (904, 24230), (1130, 19384), (1808, 12115), (2260, 9692), (2423, 9040), (4520, 4846)]