81917180

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{283}}^1\times {\mathrm{353}}^1$

素因数の和:686

約数の個数: 48

約数和(自身を含む): 177345504

約数和(自身を除く): 95428324

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 283, 353, 410, 566, 706, 820, 1132, 1412, 1415, 1765, 2830, 3530, 5660, 7060, 11603, 14473, 23206, 28946, 46412, 57892, 58015, 72365, 99899, 116030, 144730, 199798, 232060, 289460, 399596, 499495, 998990, 1997980, 4095859, 8191718, 16383436, 20479295, 40958590, 81917180]

約数ペア:

[(1, 81917180), (2, 40958590), (4, 20479295), (5, 16383436), (10, 8191718), (20, 4095859), (41, 1997980), (82, 998990), (164, 499495), (205, 399596), (283, 289460), (353, 232060), (410, 199798), (566, 144730), (706, 116030), (820, 99899), (1132, 72365), (1412, 58015), (1415, 57892), (1765, 46412), (2830, 28946), (3530, 23206), (5660, 14473), (7060, 11603)]