16820890

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{223}}^1\times {\mathrm{397}}^1$

素因数の和:646

約数の個数: 32

約数和(自身を含む): 32094720

約数和(自身を除く): 15273830

約数列:

[1, 2, 5, 10, 19, 38, 95, 190, 223, 397, 446, 794, 1115, 1985, 2230, 3970, 4237, 7543, 8474, 15086, 21185, 37715, 42370, 75430, 88531, 177062, 442655, 885310, 1682089, 3364178, 8410445, 16820890]

約数ペア:

[(1, 16820890), (2, 8410445), (5, 3364178), (10, 1682089), (19, 885310), (38, 442655), (95, 177062), (190, 88531), (223, 75430), (397, 42370), (446, 37715), (794, 21185), (1115, 15086), (1985, 8474), (2230, 7543), (3970, 4237)]