20339991

素因数分解:

$3^4\times 7^1\times {\mathrm{29}}^1\times {\mathrm{1237}}^1$

素因数の和:1285

約数の個数: 40

約数和(自身を含む): 35951520

約数和(自身を除く): 15611529

約数列:

[1, 3, 7, 9, 21, 27, 29, 63, 81, 87, 189, 203, 261, 567, 609, 783, 1237, 1827, 2349, 3711, 5481, 8659, 11133, 16443, 25977, 33399, 35873, 77931, 100197, 107619, 233793, 251111, 322857, 701379, 753333, 968571, 2259999, 2905713, 6779997, 20339991]

約数ペア:

[(1, 20339991), (3, 6779997), (7, 2905713), (9, 2259999), (21, 968571), (27, 753333), (29, 701379), (63, 322857), (81, 251111), (87, 233793), (189, 107619), (203, 100197), (261, 77931), (567, 35873), (609, 33399), (783, 25977), (1237, 16443), (1827, 11133), (2349, 8659), (3711, 5481)]