21885220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{223}}^1\times {\mathrm{701}}^1$

素因数の和:940

約数の個数: 48

約数和(自身を含む): 52835328

約数和(自身を除く): 30950108

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 223, 446, 701, 892, 1115, 1402, 1561, 2230, 2804, 3122, 3505, 4460, 4907, 6244, 7010, 7805, 9814, 14020, 15610, 19628, 24535, 31220, 49070, 98140, 156323, 312646, 625292, 781615, 1094261, 1563230, 2188522, 3126460, 4377044, 5471305, 10942610, 21885220]

約数ペア:

[(1, 21885220), (2, 10942610), (4, 5471305), (5, 4377044), (7, 3126460), (10, 2188522), (14, 1563230), (20, 1094261), (28, 781615), (35, 625292), (70, 312646), (140, 156323), (223, 98140), (446, 49070), (701, 31220), (892, 24535), (1115, 19628), (1402, 15610), (1561, 14020), (2230, 9814), (2804, 7805), (3122, 7010), (3505, 6244), (4460, 4907)]