21077025

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{271}}^1$

素因数の和:362

約数の個数: 48

約数和(自身を含む): 37640448

約数和(自身を除く): 16563423

約数列:

[1, 3, 5, 15, 17, 25, 51, 61, 75, 85, 183, 255, 271, 305, 425, 813, 915, 1037, 1275, 1355, 1525, 3111, 4065, 4575, 4607, 5185, 6775, 13821, 15555, 16531, 20325, 23035, 25925, 49593, 69105, 77775, 82655, 115175, 247965, 281027, 345525, 413275, 843081, 1239825, 1405135, 4215405, 7025675, 21077025]

約数ペア:

[(1, 21077025), (3, 7025675), (5, 4215405), (15, 1405135), (17, 1239825), (25, 843081), (51, 413275), (61, 345525), (75, 281027), (85, 247965), (183, 115175), (255, 82655), (271, 77775), (305, 69105), (425, 49593), (813, 25925), (915, 23035), (1037, 20325), (1275, 16531), (1355, 15555), (1525, 13821), (3111, 6775), (4065, 5185), (4575, 4607)]