81325760

素因数分解:

$2^6\times 5^1\times {\mathrm{79}}^1\times {\mathrm{3217}}^1$

素因数の和:3313

約数の個数: 56

約数和(自身を含む): 196169280

約数和(自身を除く): 114843520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 79, 80, 158, 160, 316, 320, 395, 632, 790, 1264, 1580, 2528, 3160, 3217, 5056, 6320, 6434, 12640, 12868, 16085, 25280, 25736, 32170, 51472, 64340, 102944, 128680, 205888, 254143, 257360, 508286, 514720, 1016572, 1029440, 1270715, 2033144, 2541430, 4066288, 5082860, 8132576, 10165720, 16265152, 20331440, 40662880, 81325760]

約数ペア:

[(1, 81325760), (2, 40662880), (4, 20331440), (5, 16265152), (8, 10165720), (10, 8132576), (16, 5082860), (20, 4066288), (32, 2541430), (40, 2033144), (64, 1270715), (79, 1029440), (80, 1016572), (158, 514720), (160, 508286), (316, 257360), (320, 254143), (395, 205888), (632, 128680), (790, 102944), (1264, 64340), (1580, 51472), (2528, 32170), (3160, 25736), (3217, 25280), (5056, 16085), (6320, 12868), (6434, 12640)]