31721355

素因数分解:

$3^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{83}}^1\times {\mathrm{149}}^1$

素因数の和:265

約数の個数: 64

約数和(自身を含む): 60480000

約数和(自身を除く): 28758645

約数列:

[1, 3, 5, 9, 15, 19, 27, 45, 57, 83, 95, 135, 149, 171, 249, 285, 415, 447, 513, 745, 747, 855, 1245, 1341, 1577, 2235, 2241, 2565, 2831, 3735, 4023, 4731, 6705, 7885, 8493, 11205, 12367, 14155, 14193, 20115, 23655, 25479, 37101, 42465, 42579, 61835, 70965, 76437, 111303, 127395, 185505, 212895, 234973, 333909, 382185, 556515, 704919, 1174865, 1669545, 2114757, 3524595, 6344271, 10573785, 31721355]

約数ペア:

[(1, 31721355), (3, 10573785), (5, 6344271), (9, 3524595), (15, 2114757), (19, 1669545), (27, 1174865), (45, 704919), (57, 556515), (83, 382185), (95, 333909), (135, 234973), (149, 212895), (171, 185505), (249, 127395), (285, 111303), (415, 76437), (447, 70965), (513, 61835), (745, 42579), (747, 42465), (855, 37101), (1245, 25479), (1341, 23655), (1577, 20115), (2235, 14193), (2241, 14155), (2565, 12367), (2831, 11205), (3735, 8493), (4023, 7885), (4731, 6705)]