20299965

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{71}}^1\times {\mathrm{389}}^1$

素因数の和:482

約数の個数: 48

約数和(自身を含む): 38413440

約数和(自身を除く): 18113475

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 71, 105, 147, 213, 245, 355, 389, 497, 735, 1065, 1167, 1491, 1945, 2485, 2723, 3479, 5835, 7455, 8169, 10437, 13615, 17395, 19061, 27619, 40845, 52185, 57183, 82857, 95305, 138095, 193333, 285915, 414285, 579999, 966665, 1353331, 2899995, 4059993, 6766655, 20299965]

約数ペア:

[(1, 20299965), (3, 6766655), (5, 4059993), (7, 2899995), (15, 1353331), (21, 966665), (35, 579999), (49, 414285), (71, 285915), (105, 193333), (147, 138095), (213, 95305), (245, 82857), (355, 57183), (389, 52185), (497, 40845), (735, 27619), (1065, 19061), (1167, 17395), (1491, 13615), (1945, 10437), (2485, 8169), (2723, 7455), (3479, 5835)]