20735920

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{193}}^1$

素因数の和:302

約数の個数: 80

約数和(自身を含む): 51960960

約数和(自身を除く): 31225040

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 79, 80, 85, 136, 158, 170, 193, 272, 316, 340, 386, 395, 632, 680, 772, 790, 965, 1264, 1343, 1360, 1544, 1580, 1930, 2686, 3088, 3160, 3281, 3860, 5372, 6320, 6562, 6715, 7720, 10744, 13124, 13430, 15247, 15440, 16405, 21488, 26248, 26860, 30494, 32810, 52496, 53720, 60988, 65620, 76235, 107440, 121976, 131240, 152470, 243952, 259199, 262480, 304940, 518398, 609880, 1036796, 1219760, 1295995, 2073592, 2591990, 4147184, 5183980, 10367960, 20735920]

約数ペア:

[(1, 20735920), (2, 10367960), (4, 5183980), (5, 4147184), (8, 2591990), (10, 2073592), (16, 1295995), (17, 1219760), (20, 1036796), (34, 609880), (40, 518398), (68, 304940), (79, 262480), (80, 259199), (85, 243952), (136, 152470), (158, 131240), (170, 121976), (193, 107440), (272, 76235), (316, 65620), (340, 60988), (386, 53720), (395, 52496), (632, 32810), (680, 30494), (772, 26860), (790, 26248), (965, 21488), (1264, 16405), (1343, 15440), (1360, 15247), (1544, 13430), (1580, 13124), (1930, 10744), (2686, 7720), (3088, 6715), (3160, 6562), (3281, 6320), (3860, 5372)]