20115888940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{223}}^1\times {\mathrm{644327}}^1$

素因数の和:644566

約数の個数: 48

約数和(自身を含む): 48494702592

約数和(自身を除く): 28378813652

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 223, 446, 892, 1115, 1561, 2230, 3122, 4460, 6244, 7805, 15610, 31220, 644327, 1288654, 2577308, 3221635, 4510289, 6443270, 9020578, 12886540, 18041156, 22551445, 45102890, 90205780, 143684921, 287369842, 574739684, 718424605, 1005794447, 1436849210, 2011588894, 2873698420, 4023177788, 5028972235, 10057944470, 20115888940]

約数ペア:

[(1, 20115888940), (2, 10057944470), (4, 5028972235), (5, 4023177788), (7, 2873698420), (10, 2011588894), (14, 1436849210), (20, 1005794447), (28, 718424605), (35, 574739684), (70, 287369842), (140, 143684921), (223, 90205780), (446, 45102890), (892, 22551445), (1115, 18041156), (1561, 12886540), (2230, 9020578), (3122, 6443270), (4460, 4510289), (6244, 3221635), (7805, 2577308), (15610, 1288654), (31220, 644327)]