21260385

素因数分解:

$3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{113}}^2$

素因数の和:274

約数の個数: 36

約数和(自身を含む): 38185212

約数和(自身を除く): 16924827

約数列:

[1, 3, 5, 9, 15, 37, 45, 111, 113, 185, 333, 339, 555, 565, 1017, 1665, 1695, 4181, 5085, 12543, 12769, 20905, 37629, 38307, 62715, 63845, 114921, 188145, 191535, 472453, 574605, 1417359, 2362265, 4252077, 7086795, 21260385]

約数ペア:

[(1, 21260385), (3, 7086795), (5, 4252077), (9, 2362265), (15, 1417359), (37, 574605), (45, 472453), (111, 191535), (113, 188145), (185, 114921), (333, 63845), (339, 62715), (555, 38307), (565, 37629), (1017, 20905), (1665, 12769), (1695, 12543), (4181, 5085)]