21489986

素因数分解:

$2^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{1291}}^1$

素因数の和:1370

約数の個数: 32

約数和(自身を含む): 39070080

約数和(自身を除く): 17580094

約数列:

[1, 2, 7, 14, 29, 41, 58, 82, 203, 287, 406, 574, 1189, 1291, 2378, 2582, 8323, 9037, 16646, 18074, 37439, 52931, 74878, 105862, 262073, 370517, 524146, 741034, 1534999, 3069998, 10744993, 21489986]

約数ペア:

[(1, 21489986), (2, 10744993), (7, 3069998), (14, 1534999), (29, 741034), (41, 524146), (58, 370517), (82, 262073), (203, 105862), (287, 74878), (406, 52931), (574, 37439), (1189, 18074), (1291, 16646), (2378, 9037), (2582, 8323)]