21395985

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{113}}^1\times {\mathrm{971}}^1$

素因数の和:1105

約数の個数: 32

約数和(自身を含む): 37231488

約数和(自身を除く): 15835503

約数列:

[1, 3, 5, 13, 15, 39, 65, 113, 195, 339, 565, 971, 1469, 1695, 2913, 4407, 4855, 7345, 12623, 14565, 22035, 37869, 63115, 109723, 189345, 329169, 548615, 1426399, 1645845, 4279197, 7131995, 21395985]

約数ペア:

[(1, 21395985), (3, 7131995), (5, 4279197), (13, 1645845), (15, 1426399), (39, 548615), (65, 329169), (113, 189345), (195, 109723), (339, 63115), (565, 37869), (971, 22035), (1469, 14565), (1695, 12623), (2913, 7345), (4407, 4855)]