81342280

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{61}}^1$

素因数の和:179

約数の個数: 128

約数和(自身を含む): 206102880

約数和(自身を除く): 124760600

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 37, 40, 53, 61, 68, 74, 85, 106, 122, 136, 148, 170, 185, 212, 244, 265, 296, 305, 340, 370, 424, 488, 530, 610, 629, 680, 740, 901, 1037, 1060, 1220, 1258, 1480, 1802, 1961, 2074, 2120, 2257, 2440, 2516, 3145, 3233, 3604, 3922, 4148, 4505, 4514, 5032, 5185, 6290, 6466, 7208, 7844, 8296, 9010, 9028, 9805, 10370, 11285, 12580, 12932, 15688, 16165, 18020, 18056, 19610, 20740, 22570, 25160, 25864, 32330, 33337, 36040, 38369, 39220, 41480, 45140, 54961, 64660, 66674, 76738, 78440, 90280, 109922, 119621, 129320, 133348, 153476, 166685, 191845, 219844, 239242, 266696, 274805, 306952, 333370, 383690, 439688, 478484, 549610, 598105, 666740, 767380, 956968, 1099220, 1196210, 1333480, 1534760, 2033557, 2198440, 2392420, 4067114, 4784840, 8134228, 10167785, 16268456, 20335570, 40671140, 81342280]

約数ペア:

[(1, 81342280), (2, 40671140), (4, 20335570), (5, 16268456), (8, 10167785), (10, 8134228), (17, 4784840), (20, 4067114), (34, 2392420), (37, 2198440), (40, 2033557), (53, 1534760), (61, 1333480), (68, 1196210), (74, 1099220), (85, 956968), (106, 767380), (122, 666740), (136, 598105), (148, 549610), (170, 478484), (185, 439688), (212, 383690), (244, 333370), (265, 306952), (296, 274805), (305, 266696), (340, 239242), (370, 219844), (424, 191845), (488, 166685), (530, 153476), (610, 133348), (629, 129320), (680, 119621), (740, 109922), (901, 90280), (1037, 78440), (1060, 76738), (1220, 66674), (1258, 64660), (1480, 54961), (1802, 45140), (1961, 41480), (2074, 39220), (2120, 38369), (2257, 36040), (2440, 33337), (2516, 32330), (3145, 25864), (3233, 25160), (3604, 22570), (3922, 20740), (4148, 19610), (4505, 18056), (4514, 18020), (5032, 16165), (5185, 15688), (6290, 12932), (6466, 12580), (7208, 11285), (7844, 10370), (8296, 9805), (9010, 9028)]