20983809

素因数分解:

$3^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{683}}^1$

素因数の和:730

約数の個数: 48

約数和(自身を含む): 37428480

約数和(自身を除く): 16444671

約数列:

[1, 3, 7, 11, 19, 21, 33, 49, 57, 77, 133, 147, 209, 231, 399, 539, 627, 683, 931, 1463, 1617, 2049, 2793, 4389, 4781, 7513, 10241, 12977, 14343, 22539, 30723, 33467, 38931, 52591, 90839, 100401, 142747, 157773, 272517, 368137, 428241, 635873, 999229, 1104411, 1907619, 2997687, 6994603, 20983809]

約数ペア:

[(1, 20983809), (3, 6994603), (7, 2997687), (11, 1907619), (19, 1104411), (21, 999229), (33, 635873), (49, 428241), (57, 368137), (77, 272517), (133, 157773), (147, 142747), (209, 100401), (231, 90839), (399, 52591), (539, 38931), (627, 33467), (683, 30723), (931, 22539), (1463, 14343), (1617, 12977), (2049, 10241), (2793, 7513), (4389, 4781)]