21872120

素因数分解:

$2^3\times 5^1\times {\mathrm{463}}^1\times {\mathrm{1181}}^1$

素因数の和:1655

約数の個数: 32

約数和(自身を含む): 49360320

約数和(自身を除く): 27488200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 463, 926, 1181, 1852, 2315, 2362, 3704, 4630, 4724, 5905, 9260, 9448, 11810, 18520, 23620, 47240, 546803, 1093606, 2187212, 2734015, 4374424, 5468030, 10936060, 21872120]

約数ペア:

[(1, 21872120), (2, 10936060), (4, 5468030), (5, 4374424), (8, 2734015), (10, 2187212), (20, 1093606), (40, 546803), (463, 47240), (926, 23620), (1181, 18520), (1852, 11810), (2315, 9448), (2362, 9260), (3704, 5905), (4630, 4724)]