21208845

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{10631}}^1$

素因数の和:10665

約数の個数: 32

約数和(自身を含む): 40826880

約数和(自身を除く): 19618035

約数列:

[1, 3, 5, 7, 15, 19, 21, 35, 57, 95, 105, 133, 285, 399, 665, 1995, 10631, 31893, 53155, 74417, 159465, 201989, 223251, 372085, 605967, 1009945, 1116255, 1413923, 3029835, 4241769, 7069615, 21208845]

約数ペア:

[(1, 21208845), (3, 7069615), (5, 4241769), (7, 3029835), (15, 1413923), (19, 1116255), (21, 1009945), (35, 605967), (57, 372085), (95, 223251), (105, 201989), (133, 159465), (285, 74417), (399, 53155), (665, 31893), (1995, 10631)]