31220721

素因数分解:

$3^4\times 7^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{79}}^1$

素因数の和:156

約数の個数: 80

約数和(自身を含む): 58544640

約数和(自身を除く): 27323919

約数列:

[1, 3, 7, 9, 17, 21, 27, 41, 51, 63, 79, 81, 119, 123, 153, 189, 237, 287, 357, 369, 459, 553, 567, 697, 711, 861, 1071, 1107, 1343, 1377, 1659, 2091, 2133, 2583, 3213, 3239, 3321, 4029, 4879, 4977, 6273, 6399, 7749, 9401, 9639, 9717, 12087, 14637, 14931, 18819, 22673, 23247, 28203, 29151, 36261, 43911, 44793, 55063, 56457, 68019, 84609, 87453, 108783, 131733, 165189, 204057, 253827, 262359, 385441, 395199, 495567, 612171, 761481, 1156323, 1486701, 1836513, 3468969, 4460103, 10406907, 31220721]

約数ペア:

[(1, 31220721), (3, 10406907), (7, 4460103), (9, 3468969), (17, 1836513), (21, 1486701), (27, 1156323), (41, 761481), (51, 612171), (63, 495567), (79, 395199), (81, 385441), (119, 262359), (123, 253827), (153, 204057), (189, 165189), (237, 131733), (287, 108783), (357, 87453), (369, 84609), (459, 68019), (553, 56457), (567, 55063), (697, 44793), (711, 43911), (861, 36261), (1071, 29151), (1107, 28203), (1343, 23247), (1377, 22673), (1659, 18819), (2091, 14931), (2133, 14637), (2583, 12087), (3213, 9717), (3239, 9639), (3321, 9401), (4029, 7749), (4879, 6399), (4977, 6273)]