21576560

素因数分解:

$2^4\times 5^1\times {\mathrm{173}}^1\times {\mathrm{1559}}^1$

素因数の和:1745

約数の個数: 40

約数和(自身を含む): 50487840

約数和(自身を除く): 28911280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 173, 346, 692, 865, 1384, 1559, 1730, 2768, 3118, 3460, 6236, 6920, 7795, 12472, 13840, 15590, 24944, 31180, 62360, 124720, 269707, 539414, 1078828, 1348535, 2157656, 2697070, 4315312, 5394140, 10788280, 21576560]

約数ペア:

[(1, 21576560), (2, 10788280), (4, 5394140), (5, 4315312), (8, 2697070), (10, 2157656), (16, 1348535), (20, 1078828), (40, 539414), (80, 269707), (173, 124720), (346, 62360), (692, 31180), (865, 24944), (1384, 15590), (1559, 13840), (1730, 12472), (2768, 7795), (3118, 6920), (3460, 6236)]