21654640

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{38669}}^1$

素因数の和:38689

約数の個数: 40

約数和(自身を含む): 57540960

約数和(自身を除く): 35886320

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 38669, 77338, 154676, 193345, 270683, 309352, 386690, 541366, 618704, 773380, 1082732, 1353415, 1546760, 2165464, 2706830, 3093520, 4330928, 5413660, 10827320, 21654640]

約数ペア:

[(1, 21654640), (2, 10827320), (4, 5413660), (5, 4330928), (7, 3093520), (8, 2706830), (10, 2165464), (14, 1546760), (16, 1353415), (20, 1082732), (28, 773380), (35, 618704), (40, 541366), (56, 386690), (70, 309352), (80, 270683), (112, 193345), (140, 154676), (280, 77338), (560, 38669)]