21096560

素因数分解:

$2^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{2963}}^1$

素因数の和:3065

約数の個数: 40

約数和(自身を含む): 49617360

約数和(自身を除く): 28520800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 178, 356, 445, 712, 890, 1424, 1780, 2963, 3560, 5926, 7120, 11852, 14815, 23704, 29630, 47408, 59260, 118520, 237040, 263707, 527414, 1054828, 1318535, 2109656, 2637070, 4219312, 5274140, 10548280, 21096560]

約数ペア:

[(1, 21096560), (2, 10548280), (4, 5274140), (5, 4219312), (8, 2637070), (10, 2109656), (16, 1318535), (20, 1054828), (40, 527414), (80, 263707), (89, 237040), (178, 118520), (356, 59260), (445, 47408), (712, 29630), (890, 23704), (1424, 14815), (1780, 11852), (2963, 7120), (3560, 5926)]