21390712

素因数分解:

$2^3\times 7^1\times {\mathrm{381977}}^1$

素因数の和:381990

約数の個数: 16

約数和(自身を含む): 45837360

約数和(自身を除く): 24446648

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 381977, 763954, 1527908, 2673839, 3055816, 5347678, 10695356, 21390712]

約数ペア:

[(1, 21390712), (2, 10695356), (4, 5347678), (7, 3055816), (8, 2673839), (14, 1527908), (28, 763954), (56, 381977)]