18740072

素因数分解:

$2^3\times {\mathrm{13}}^2\times {\mathrm{83}}^1\times {\mathrm{167}}^1$

素因数の和:282

約数の個数: 48

約数和(自身を含む): 38737440

約数和(自身を除く): 19997368

約数列:

[1, 2, 4, 8, 13, 26, 52, 83, 104, 166, 167, 169, 332, 334, 338, 664, 668, 676, 1079, 1336, 1352, 2158, 2171, 4316, 4342, 8632, 8684, 13861, 14027, 17368, 27722, 28054, 28223, 55444, 56108, 56446, 110888, 112216, 112892, 180193, 225784, 360386, 720772, 1441544, 2342509, 4685018, 9370036, 18740072]

約数ペア:

[(1, 18740072), (2, 9370036), (4, 4685018), (8, 2342509), (13, 1441544), (26, 720772), (52, 360386), (83, 225784), (104, 180193), (166, 112892), (167, 112216), (169, 110888), (332, 56446), (334, 56108), (338, 55444), (664, 28223), (668, 28054), (676, 27722), (1079, 17368), (1336, 14027), (1352, 13861), (2158, 8684), (2171, 8632), (4316, 4342)]