21808725

素因数分解:

$3^1\times 5^2\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{271}}^1$

素因数の和:350

約数の個数: 48

約数和(自身を含む): 38449920

約数和(自身を除く): 16641195

約数列:

[1, 3, 5, 15, 25, 29, 37, 75, 87, 111, 145, 185, 271, 435, 555, 725, 813, 925, 1073, 1355, 2175, 2775, 3219, 4065, 5365, 6775, 7859, 10027, 16095, 20325, 23577, 26825, 30081, 39295, 50135, 80475, 117885, 150405, 196475, 250675, 290783, 589425, 752025, 872349, 1453915, 4361745, 7269575, 21808725]

約数ペア:

[(1, 21808725), (3, 7269575), (5, 4361745), (15, 1453915), (25, 872349), (29, 752025), (37, 589425), (75, 290783), (87, 250675), (111, 196475), (145, 150405), (185, 117885), (271, 80475), (435, 50135), (555, 39295), (725, 30081), (813, 26825), (925, 23577), (1073, 20325), (1355, 16095), (2175, 10027), (2775, 7859), (3219, 6775), (4065, 5365)]