21438160

素因数分解:

$2^4\times 5^1\times {\mathrm{173}}^1\times {\mathrm{1549}}^1$

素因数の和:1735

約数の個数: 40

約数和(自身を含む): 50164200

約数和(自身を除く): 28726040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 173, 346, 692, 865, 1384, 1549, 1730, 2768, 3098, 3460, 6196, 6920, 7745, 12392, 13840, 15490, 24784, 30980, 61960, 123920, 267977, 535954, 1071908, 1339885, 2143816, 2679770, 4287632, 5359540, 10719080, 21438160]

約数ペア:

[(1, 21438160), (2, 10719080), (4, 5359540), (5, 4287632), (8, 2679770), (10, 2143816), (16, 1339885), (20, 1071908), (40, 535954), (80, 267977), (173, 123920), (346, 61960), (692, 30980), (865, 24784), (1384, 15490), (1549, 13840), (1730, 12392), (2768, 7745), (3098, 6920), (3460, 6196)]