71981973

素因数分解:

$3^3\times 7^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{571}}^1$

素因数の和:639

約数の個数: 64

約数和(自身を含む): 131788800

約数和(自身を除く): 59806827

約数列:

[1, 3, 7, 9, 21, 23, 27, 29, 63, 69, 87, 161, 189, 203, 207, 261, 483, 571, 609, 621, 667, 783, 1449, 1713, 1827, 2001, 3997, 4347, 4669, 5139, 5481, 6003, 11991, 13133, 14007, 15417, 16559, 18009, 35973, 39399, 42021, 49677, 91931, 107919, 115913, 118197, 126063, 149031, 275793, 347739, 354591, 380857, 447093, 827379, 1043217, 1142571, 2482137, 2665999, 3129651, 3427713, 7997997, 10283139, 23993991, 71981973]

約数ペア:

[(1, 71981973), (3, 23993991), (7, 10283139), (9, 7997997), (21, 3427713), (23, 3129651), (27, 2665999), (29, 2482137), (63, 1142571), (69, 1043217), (87, 827379), (161, 447093), (189, 380857), (203, 354591), (207, 347739), (261, 275793), (483, 149031), (571, 126063), (609, 118197), (621, 115913), (667, 107919), (783, 91931), (1449, 49677), (1713, 42021), (1827, 39399), (2001, 35973), (3997, 18009), (4347, 16559), (4669, 15417), (5139, 14007), (5481, 13133), (6003, 11991)]