21274395

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{4391}}^1$

素因数の和:4435

約数の個数: 32

約数和(自身を含む): 37946880

約数和(自身を除く): 16672485

約数列:

[1, 3, 5, 15, 17, 19, 51, 57, 85, 95, 255, 285, 323, 969, 1615, 4391, 4845, 13173, 21955, 65865, 74647, 83429, 223941, 250287, 373235, 417145, 1119705, 1251435, 1418293, 4254879, 7091465, 21274395]

約数ペア:

[(1, 21274395), (3, 7091465), (5, 4254879), (15, 1418293), (17, 1251435), (19, 1119705), (51, 417145), (57, 373235), (85, 250287), (95, 223941), (255, 83429), (285, 74647), (323, 65865), (969, 21955), (1615, 13173), (4391, 4845)]