21872560

素因数分解:

$2^4\times 5^1\times {\mathrm{101}}^1\times {\mathrm{2707}}^1$

素因数の和:2821

約数の個数: 40

約数和(自身を含む): 51376176

約数和(自身を除く): 29503616

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 101, 202, 404, 505, 808, 1010, 1616, 2020, 2707, 4040, 5414, 8080, 10828, 13535, 21656, 27070, 43312, 54140, 108280, 216560, 273407, 546814, 1093628, 1367035, 2187256, 2734070, 4374512, 5468140, 10936280, 21872560]

約数ペア:

[(1, 21872560), (2, 10936280), (4, 5468140), (5, 4374512), (8, 2734070), (10, 2187256), (16, 1367035), (20, 1093628), (40, 546814), (80, 273407), (101, 216560), (202, 108280), (404, 54140), (505, 43312), (808, 27070), (1010, 21656), (1616, 13535), (2020, 10828), (2707, 8080), (4040, 5414)]