20993385

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{619}}^1$

素因数の和:670

約数の個数: 64

約数和(自身を含む): 42854400

約数和(自身を除く): 21861015

約数列:

[1, 3, 5, 7, 15, 17, 19, 21, 35, 51, 57, 85, 95, 105, 119, 133, 255, 285, 323, 357, 399, 595, 619, 665, 969, 1615, 1785, 1857, 1995, 2261, 3095, 4333, 4845, 6783, 9285, 10523, 11305, 11761, 12999, 21665, 31569, 33915, 35283, 52615, 58805, 64995, 73661, 82327, 157845, 176415, 199937, 220983, 246981, 368305, 411635, 599811, 999685, 1104915, 1234905, 1399559, 2999055, 4198677, 6997795, 20993385]

約数ペア:

[(1, 20993385), (3, 6997795), (5, 4198677), (7, 2999055), (15, 1399559), (17, 1234905), (19, 1104915), (21, 999685), (35, 599811), (51, 411635), (57, 368305), (85, 246981), (95, 220983), (105, 199937), (119, 176415), (133, 157845), (255, 82327), (285, 73661), (323, 64995), (357, 58805), (399, 52615), (595, 35283), (619, 33915), (665, 31569), (969, 21665), (1615, 12999), (1785, 11761), (1857, 11305), (1995, 10523), (2261, 9285), (3095, 6783), (4333, 4845)]