21495340

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{83}}^1\times {\mathrm{563}}^1$

素因数の和:678

約数の個数: 48

約数和(自身を含む): 47755008

約数和(自身を除く): 26259668

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 83, 92, 115, 166, 230, 332, 415, 460, 563, 830, 1126, 1660, 1909, 2252, 2815, 3818, 5630, 7636, 9545, 11260, 12949, 19090, 25898, 38180, 46729, 51796, 64745, 93458, 129490, 186916, 233645, 258980, 467290, 934580, 1074767, 2149534, 4299068, 5373835, 10747670, 21495340]

約数ペア:

[(1, 21495340), (2, 10747670), (4, 5373835), (5, 4299068), (10, 2149534), (20, 1074767), (23, 934580), (46, 467290), (83, 258980), (92, 233645), (115, 186916), (166, 129490), (230, 93458), (332, 64745), (415, 51796), (460, 46729), (563, 38180), (830, 25898), (1126, 19090), (1660, 12949), (1909, 11260), (2252, 9545), (2815, 7636), (3818, 5630)]