21495070

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{103}}^1\times {\mathrm{509}}^1$

素因数の和:660

約数の個数: 32

約数和(自身を含む): 40098240

約数和(自身を除く): 18603170

約数列:

[1, 2, 5, 10, 41, 82, 103, 205, 206, 410, 509, 515, 1018, 1030, 2545, 4223, 5090, 8446, 20869, 21115, 41738, 42230, 52427, 104345, 104854, 208690, 262135, 524270, 2149507, 4299014, 10747535, 21495070]

約数ペア:

[(1, 21495070), (2, 10747535), (5, 4299014), (10, 2149507), (41, 524270), (82, 262135), (103, 208690), (205, 104854), (206, 104345), (410, 52427), (509, 42230), (515, 41738), (1018, 21115), (1030, 20869), (2545, 8446), (4223, 5090)]