20891140

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{73}}^1\times {\mathrm{349}}^1$

素因数の和:472

約数の個数: 48

約数和(自身を含む): 45687600

約数和(自身を除く): 24796460

約数列:

[1, 2, 4, 5, 10, 20, 41, 73, 82, 146, 164, 205, 292, 349, 365, 410, 698, 730, 820, 1396, 1460, 1745, 2993, 3490, 5986, 6980, 11972, 14309, 14965, 25477, 28618, 29930, 50954, 57236, 59860, 71545, 101908, 127385, 143090, 254770, 286180, 509540, 1044557, 2089114, 4178228, 5222785, 10445570, 20891140]

約数ペア:

[(1, 20891140), (2, 10445570), (4, 5222785), (5, 4178228), (10, 2089114), (20, 1044557), (41, 509540), (73, 286180), (82, 254770), (146, 143090), (164, 127385), (205, 101908), (292, 71545), (349, 59860), (365, 57236), (410, 50954), (698, 29930), (730, 28618), (820, 25477), (1396, 14965), (1460, 14309), (1745, 11972), (2993, 6980), (3490, 5986)]