20865885

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{1741}}^1$

素因数の和:1813

約数の個数: 32

約数和(自身を含む): 36122112

約数和(自身を除く): 15256227

約数列:

[1, 3, 5, 15, 17, 47, 51, 85, 141, 235, 255, 705, 799, 1741, 2397, 3995, 5223, 8705, 11985, 26115, 29597, 81827, 88791, 147985, 245481, 409135, 443955, 1227405, 1391059, 4173177, 6955295, 20865885]

約数ペア:

[(1, 20865885), (3, 6955295), (5, 4173177), (15, 1391059), (17, 1227405), (47, 443955), (51, 409135), (85, 245481), (141, 147985), (235, 88791), (255, 81827), (705, 29597), (799, 26115), (1741, 11985), (2397, 8705), (3995, 5223)]