20879991

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{229}}^1\times {\mathrm{307}}^1$

素因数の和:556

約数の個数: 32

約数和(自身を含む): 34003200

約数和(自身を除く): 13123209

約数列:

[1, 3, 9, 11, 27, 33, 99, 229, 297, 307, 687, 921, 2061, 2519, 2763, 3377, 6183, 7557, 8289, 10131, 22671, 30393, 68013, 70303, 91179, 210909, 632727, 773333, 1898181, 2319999, 6959997, 20879991]

約数ペア:

[(1, 20879991), (3, 6959997), (9, 2319999), (11, 1898181), (27, 773333), (33, 632727), (99, 210909), (229, 91179), (297, 70303), (307, 68013), (687, 30393), (921, 22671), (2061, 10131), (2519, 8289), (2763, 7557), (3377, 6183)]