128972240

素因数分解:

$2^4\times 5^1\times {\mathrm{79}}^1\times {\mathrm{20407}}^1$

素因数の和:20499

約数の個数: 40

約数和(自身を含む): 303671040

約数和(自身を除く): 174698800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 79, 80, 158, 316, 395, 632, 790, 1264, 1580, 3160, 6320, 20407, 40814, 81628, 102035, 163256, 204070, 326512, 408140, 816280, 1612153, 1632560, 3224306, 6448612, 8060765, 12897224, 16121530, 25794448, 32243060, 64486120, 128972240]

約数ペア:

[(1, 128972240), (2, 64486120), (4, 32243060), (5, 25794448), (8, 16121530), (10, 12897224), (16, 8060765), (20, 6448612), (40, 3224306), (79, 1632560), (80, 1612153), (158, 816280), (316, 408140), (395, 326512), (632, 204070), (790, 163256), (1264, 102035), (1580, 81628), (3160, 40814), (6320, 20407)]