81229725

素因数分解:

$3^2\times 5^2\times {\mathrm{29}}^1\times {\mathrm{59}}^1\times {\mathrm{211}}^1$

素因数の和:315

約数の個数: 72

約数和(自身を含む): 153784800

約数和(自身を除く): 72555075

約数列:

[1, 3, 5, 9, 15, 25, 29, 45, 59, 75, 87, 145, 177, 211, 225, 261, 295, 435, 531, 633, 725, 885, 1055, 1305, 1475, 1711, 1899, 2175, 2655, 3165, 4425, 5133, 5275, 6119, 6525, 8555, 9495, 12449, 13275, 15399, 15825, 18357, 25665, 30595, 37347, 42775, 47475, 55071, 62245, 76995, 91785, 112041, 128325, 152975, 186735, 275355, 311225, 361021, 384975, 458925, 560205, 933675, 1083063, 1376775, 1805105, 2801025, 3249189, 5415315, 9025525, 16245945, 27076575, 81229725]

約数ペア:

[(1, 81229725), (3, 27076575), (5, 16245945), (9, 9025525), (15, 5415315), (25, 3249189), (29, 2801025), (45, 1805105), (59, 1376775), (75, 1083063), (87, 933675), (145, 560205), (177, 458925), (211, 384975), (225, 361021), (261, 311225), (295, 275355), (435, 186735), (531, 152975), (633, 128325), (725, 112041), (885, 91785), (1055, 76995), (1305, 62245), (1475, 55071), (1711, 47475), (1899, 42775), (2175, 37347), (2655, 30595), (3165, 25665), (4425, 18357), (5133, 15825), (5275, 15399), (6119, 13275), (6525, 12449), (8555, 9495)]