21072580

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{107}}^1\times {\mathrm{229}}^1$

素因数の和:388

約数の個数: 48

約数和(自身を含む): 45904320

約数和(自身を除く): 24831740

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 107, 172, 214, 215, 229, 428, 430, 458, 535, 860, 916, 1070, 1145, 2140, 2290, 4580, 4601, 9202, 9847, 18404, 19694, 23005, 24503, 39388, 46010, 49006, 49235, 92020, 98012, 98470, 122515, 196940, 245030, 490060, 1053629, 2107258, 4214516, 5268145, 10536290, 21072580]

約数ペア:

[(1, 21072580), (2, 10536290), (4, 5268145), (5, 4214516), (10, 2107258), (20, 1053629), (43, 490060), (86, 245030), (107, 196940), (172, 122515), (214, 98470), (215, 98012), (229, 92020), (428, 49235), (430, 49006), (458, 46010), (535, 39388), (860, 24503), (916, 23005), (1070, 19694), (1145, 18404), (2140, 9847), (2290, 9202), (4580, 4601)]