1991010

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{499}}^1$

素因数の和:535

約数の個数: 64

約数和(自身を含む): 5760000

約数和(自身を除く): 3768990

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 19, 21, 30, 35, 38, 42, 57, 70, 95, 105, 114, 133, 190, 210, 266, 285, 399, 499, 570, 665, 798, 998, 1330, 1497, 1995, 2495, 2994, 3493, 3990, 4990, 6986, 7485, 9481, 10479, 14970, 17465, 18962, 20958, 28443, 34930, 47405, 52395, 56886, 66367, 94810, 104790, 132734, 142215, 199101, 284430, 331835, 398202, 663670, 995505, 1991010]

約数ペア:

[(1, 1991010), (2, 995505), (3, 663670), (5, 398202), (6, 331835), (7, 284430), (10, 199101), (14, 142215), (15, 132734), (19, 104790), (21, 94810), (30, 66367), (35, 56886), (38, 52395), (42, 47405), (57, 34930), (70, 28443), (95, 20958), (105, 18962), (114, 17465), (133, 14970), (190, 10479), (210, 9481), (266, 7485), (285, 6986), (399, 4990), (499, 3990), (570, 3493), (665, 2994), (798, 2495), (998, 1995), (1330, 1497)]