66781520

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{409}}^1$

素因数の和:592

約数の個数: 80

約数和(自身を含む): 168687120

約数和(自身を除く): 101905600

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 157, 208, 260, 314, 409, 520, 628, 785, 818, 1040, 1256, 1570, 1636, 2041, 2045, 2512, 3140, 3272, 4082, 4090, 5317, 6280, 6544, 8164, 8180, 10205, 10634, 12560, 16328, 16360, 20410, 21268, 26585, 32656, 32720, 40820, 42536, 53170, 64213, 81640, 85072, 106340, 128426, 163280, 212680, 256852, 321065, 425360, 513704, 642130, 834769, 1027408, 1284260, 1669538, 2568520, 3339076, 4173845, 5137040, 6678152, 8347690, 13356304, 16695380, 33390760, 66781520]

約数ペア:

[(1, 66781520), (2, 33390760), (4, 16695380), (5, 13356304), (8, 8347690), (10, 6678152), (13, 5137040), (16, 4173845), (20, 3339076), (26, 2568520), (40, 1669538), (52, 1284260), (65, 1027408), (80, 834769), (104, 642130), (130, 513704), (157, 425360), (208, 321065), (260, 256852), (314, 212680), (409, 163280), (520, 128426), (628, 106340), (785, 85072), (818, 81640), (1040, 64213), (1256, 53170), (1570, 42536), (1636, 40820), (2041, 32720), (2045, 32656), (2512, 26585), (3140, 21268), (3272, 20410), (4082, 16360), (4090, 16328), (5317, 12560), (6280, 10634), (6544, 10205), (8164, 8180)]