19915120

素因数分解:

$2^4\times 5^1\times {\mathrm{113}}^1\times {\mathrm{2203}}^1$

素因数の和:2329

約数の個数: 40

約数和(自身を含む): 46733616

約数和(自身を除く): 26818496

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 113, 226, 452, 565, 904, 1130, 1808, 2203, 2260, 4406, 4520, 8812, 9040, 11015, 17624, 22030, 35248, 44060, 88120, 176240, 248939, 497878, 995756, 1244695, 1991512, 2489390, 3983024, 4978780, 9957560, 19915120]

約数ペア:

[(1, 19915120), (2, 9957560), (4, 4978780), (5, 3983024), (8, 2489390), (10, 1991512), (16, 1244695), (20, 995756), (40, 497878), (80, 248939), (113, 176240), (226, 88120), (452, 44060), (565, 35248), (904, 22030), (1130, 17624), (1808, 11015), (2203, 9040), (2260, 8812), (4406, 4520)]