21298030

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{173}}^1\times {\mathrm{947}}^1$

素因数の和:1140

約数の個数: 32

約数和(自身を含む): 41567904

約数和(自身を除く): 20269874

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 173, 346, 865, 947, 1730, 1894, 2249, 4498, 4735, 9470, 11245, 12311, 22490, 24622, 61555, 123110, 163831, 327662, 819155, 1638310, 2129803, 4259606, 10649015, 21298030]

約数ペア:

[(1, 21298030), (2, 10649015), (5, 4259606), (10, 2129803), (13, 1638310), (26, 819155), (65, 327662), (130, 163831), (173, 123110), (346, 61555), (865, 24622), (947, 22490), (1730, 12311), (1894, 11245), (2249, 9470), (4498, 4735)]