21406155

素因数分解:

$3^1\times 5^1\times {\mathrm{73}}^1\times {\mathrm{113}}^1\times {\mathrm{173}}^1$

素因数の和:367

約数の個数: 32

約数和(自身を含む): 35228736

約数和(自身を除く): 13822581

約数列:

[1, 3, 5, 15, 73, 113, 173, 219, 339, 365, 519, 565, 865, 1095, 1695, 2595, 8249, 12629, 19549, 24747, 37887, 41245, 58647, 63145, 97745, 123735, 189435, 293235, 1427077, 4281231, 7135385, 21406155]

約数ペア:

[(1, 21406155), (3, 7135385), (5, 4281231), (15, 1427077), (73, 293235), (113, 189435), (173, 123735), (219, 97745), (339, 63145), (365, 58647), (519, 41245), (565, 37887), (865, 24747), (1095, 19549), (1695, 12629), (2595, 8249)]