21259280

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{37963}}^1$

素因数の和:37983

約数の個数: 40

約数和(自身を含む): 56490432

約数和(自身を除く): 35231152

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 37963, 75926, 151852, 189815, 265741, 303704, 379630, 531482, 607408, 759260, 1062964, 1328705, 1518520, 2125928, 2657410, 3037040, 4251856, 5314820, 10629640, 21259280]

約数ペア:

[(1, 21259280), (2, 10629640), (4, 5314820), (5, 4251856), (7, 3037040), (8, 2657410), (10, 2125928), (14, 1518520), (16, 1328705), (20, 1062964), (28, 759260), (35, 607408), (40, 531482), (56, 379630), (70, 303704), (80, 265741), (112, 189815), (140, 151852), (280, 75926), (560, 37963)]