20988795

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{1553}}^1$

素因数の和:1631

約数の個数: 32

約数和(自身を含む): 36251712

約数和(自身を除く): 15262917

約数列:

[1, 3, 5, 15, 17, 51, 53, 85, 159, 255, 265, 795, 901, 1553, 2703, 4505, 4659, 7765, 13515, 23295, 26401, 79203, 82309, 132005, 246927, 396015, 411545, 1234635, 1399253, 4197759, 6996265, 20988795]

約数ペア:

[(1, 20988795), (3, 6996265), (5, 4197759), (15, 1399253), (17, 1234635), (51, 411545), (53, 396015), (85, 246927), (159, 132005), (255, 82309), (265, 79203), (795, 26401), (901, 23295), (1553, 13515), (2703, 7765), (4505, 4659)]