20512965

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{103}}^1$

素因数の和:210

約数の個数: 64

約数和(自身を含む): 38817792

約数和(自身を除く): 18304827

約数列:

[1, 3, 5, 11, 15, 17, 33, 51, 55, 71, 85, 103, 165, 187, 213, 255, 309, 355, 515, 561, 781, 935, 1065, 1133, 1207, 1545, 1751, 2343, 2805, 3399, 3621, 3905, 5253, 5665, 6035, 7313, 8755, 11715, 13277, 16995, 18105, 19261, 21939, 26265, 36565, 39831, 57783, 66385, 80443, 96305, 109695, 124321, 199155, 241329, 288915, 372963, 402215, 621605, 1206645, 1367531, 1864815, 4102593, 6837655, 20512965]

約数ペア:

[(1, 20512965), (3, 6837655), (5, 4102593), (11, 1864815), (15, 1367531), (17, 1206645), (33, 621605), (51, 402215), (55, 372963), (71, 288915), (85, 241329), (103, 199155), (165, 124321), (187, 109695), (213, 96305), (255, 80443), (309, 66385), (355, 57783), (515, 39831), (561, 36565), (781, 26265), (935, 21939), (1065, 19261), (1133, 18105), (1207, 16995), (1545, 13277), (1751, 11715), (2343, 8755), (2805, 7313), (3399, 6035), (3621, 5665), (3905, 5253)]