21985120

素因数分解:

$2^5\times 5^1\times {\mathrm{313}}^1\times {\mathrm{439}}^1$

素因数の和:767

約数の個数: 48

約数和(自身を含む): 52224480

約数和(自身を除く): 30239360

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 313, 439, 626, 878, 1252, 1565, 1756, 2195, 2504, 3130, 3512, 4390, 5008, 6260, 7024, 8780, 10016, 12520, 14048, 17560, 25040, 35120, 50080, 70240, 137407, 274814, 549628, 687035, 1099256, 1374070, 2198512, 2748140, 4397024, 5496280, 10992560, 21985120]

約数ペア:

[(1, 21985120), (2, 10992560), (4, 5496280), (5, 4397024), (8, 2748140), (10, 2198512), (16, 1374070), (20, 1099256), (32, 687035), (40, 549628), (80, 274814), (160, 137407), (313, 70240), (439, 50080), (626, 35120), (878, 25040), (1252, 17560), (1565, 14048), (1756, 12520), (2195, 10016), (2504, 8780), (3130, 7024), (3512, 6260), (4390, 5008)]