21215408

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{42773}}^1$

素因数の和:42812

約数の個数: 20

約数和(自身を含む): 42431808

約数和(自身を除く): 21216400

約数列:

[1, 2, 4, 8, 16, 31, 62, 124, 248, 496, 42773, 85546, 171092, 342184, 684368, 1325963, 2651926, 5303852, 10607704, 21215408]

約数ペア:

[(1, 21215408), (2, 10607704), (4, 5303852), (8, 2651926), (16, 1325963), (31, 684368), (62, 342184), (124, 171092), (248, 85546), (496, 42773)]