129123920

素因数分解:

$2^4\times 5^1\times {\mathrm{79}}^1\times {\mathrm{20431}}^1$

素因数の和:20523

約数の個数: 40

約数和(自身を含む): 304028160

約数和(自身を除く): 174904240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 79, 80, 158, 316, 395, 632, 790, 1264, 1580, 3160, 6320, 20431, 40862, 81724, 102155, 163448, 204310, 326896, 408620, 817240, 1614049, 1634480, 3228098, 6456196, 8070245, 12912392, 16140490, 25824784, 32280980, 64561960, 129123920]

約数ペア:

[(1, 129123920), (2, 64561960), (4, 32280980), (5, 25824784), (8, 16140490), (10, 12912392), (16, 8070245), (20, 6456196), (40, 3228098), (79, 1634480), (80, 1614049), (158, 817240), (316, 408620), (395, 326896), (632, 204310), (790, 163448), (1264, 102155), (1580, 81724), (3160, 40862), (6320, 20431)]