20964405

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{2593}}^1$

素因数の和:2626

約数の個数: 48

約数和(自身を含む): 42583104

約数和(自身を除く): 21618699

約数列:

[1, 3, 5, 7, 11, 15, 21, 33, 35, 49, 55, 77, 105, 147, 165, 231, 245, 385, 539, 735, 1155, 1617, 2593, 2695, 7779, 8085, 12965, 18151, 28523, 38895, 54453, 85569, 90755, 127057, 142615, 199661, 272265, 381171, 427845, 598983, 635285, 998305, 1397627, 1905855, 2994915, 4192881, 6988135, 20964405]

約数ペア:

[(1, 20964405), (3, 6988135), (5, 4192881), (7, 2994915), (11, 1905855), (15, 1397627), (21, 998305), (33, 635285), (35, 598983), (49, 427845), (55, 381171), (77, 272265), (105, 199661), (147, 142615), (165, 127057), (231, 90755), (245, 85569), (385, 54453), (539, 38895), (735, 28523), (1155, 18151), (1617, 12965), (2593, 8085), (2695, 7779)]