20878431

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{233}}^1\times {\mathrm{251}}^1$

素因数の和:511

約数の個数: 32

約数和(自身を含む): 33965568

約数和(自身を除く): 13087137

約数列:

[1, 3, 7, 17, 21, 51, 119, 233, 251, 357, 699, 753, 1631, 1757, 3961, 4267, 4893, 5271, 11883, 12801, 27727, 29869, 58483, 83181, 89607, 175449, 409381, 994211, 1228143, 2982633, 6959477, 20878431]

約数ペア:

[(1, 20878431), (3, 6959477), (7, 2982633), (17, 1228143), (21, 994211), (51, 409381), (119, 175449), (233, 89607), (251, 83181), (357, 58483), (699, 29869), (753, 27727), (1631, 12801), (1757, 11883), (3961, 5271), (4267, 4893)]