21821786

素因数分解:

$2^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{103}}^1\times {\mathrm{409}}^1$

素因数の和:558

約数の個数: 32

約数和(自身を含む): 38887680

約数和(自身を除く): 17065894

約数列:

[1, 2, 7, 14, 37, 74, 103, 206, 259, 409, 518, 721, 818, 1442, 2863, 3811, 5726, 7622, 15133, 26677, 30266, 42127, 53354, 84254, 105931, 211862, 294889, 589778, 1558699, 3117398, 10910893, 21821786]

約数ペア:

[(1, 21821786), (2, 10910893), (7, 3117398), (14, 1558699), (37, 589778), (74, 294889), (103, 211862), (206, 105931), (259, 84254), (409, 53354), (518, 42127), (721, 30266), (818, 26677), (1442, 15133), (2863, 7622), (3811, 5726)]