20719251

素因数分解:

$3^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{181}}^1$

素因数の和:296

約数の個数: 48

約数和(自身を含む): 36341760

約数和(自身を除く): 15622509

約数列:

[1, 3, 7, 9, 21, 23, 63, 69, 79, 161, 181, 207, 237, 483, 543, 553, 711, 1267, 1449, 1629, 1659, 1817, 3801, 4163, 4977, 5451, 11403, 12489, 12719, 14299, 16353, 29141, 37467, 38157, 42897, 87423, 100093, 114471, 128691, 262269, 300279, 328877, 900837, 986631, 2302139, 2959893, 6906417, 20719251]

約数ペア:

[(1, 20719251), (3, 6906417), (7, 2959893), (9, 2302139), (21, 986631), (23, 900837), (63, 328877), (69, 300279), (79, 262269), (161, 128691), (181, 114471), (207, 100093), (237, 87423), (483, 42897), (543, 38157), (553, 37467), (711, 29141), (1267, 16353), (1449, 14299), (1629, 12719), (1659, 12489), (1817, 11403), (3801, 5451), (4163, 4977)]