20984439

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{113}}^1\times {\mathrm{239}}^1$

素因数の和:399

約数の個数: 32

約数和(自身を含む): 33269760

約数和(自身を除く): 12285321

約数列:

[1, 3, 7, 21, 37, 111, 113, 239, 259, 339, 717, 777, 791, 1673, 2373, 4181, 5019, 8843, 12543, 26529, 27007, 29267, 61901, 81021, 87801, 185703, 189049, 567147, 999259, 2997777, 6994813, 20984439]

約数ペア:

[(1, 20984439), (3, 6994813), (7, 2997777), (21, 999259), (37, 567147), (111, 189049), (113, 185703), (239, 87801), (259, 81021), (339, 61901), (717, 29267), (777, 27007), (791, 26529), (1673, 12543), (2373, 8843), (4181, 5019)]