20445200

素因数分解:

$2^4\times 5^2\times {\mathrm{79}}^1\times {\mathrm{647}}^1$

素因数の和:744

約数の個数: 60

約数和(自身を含む): 49818240

約数和(自身を除く): 29373040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 79, 80, 100, 158, 200, 316, 395, 400, 632, 647, 790, 1264, 1294, 1580, 1975, 2588, 3160, 3235, 3950, 5176, 6320, 6470, 7900, 10352, 12940, 15800, 16175, 25880, 31600, 32350, 51113, 51760, 64700, 102226, 129400, 204452, 255565, 258800, 408904, 511130, 817808, 1022260, 1277825, 2044520, 2555650, 4089040, 5111300, 10222600, 20445200]

約数ペア:

[(1, 20445200), (2, 10222600), (4, 5111300), (5, 4089040), (8, 2555650), (10, 2044520), (16, 1277825), (20, 1022260), (25, 817808), (40, 511130), (50, 408904), (79, 258800), (80, 255565), (100, 204452), (158, 129400), (200, 102226), (316, 64700), (395, 51760), (400, 51113), (632, 32350), (647, 31600), (790, 25880), (1264, 16175), (1294, 15800), (1580, 12940), (1975, 10352), (2588, 7900), (3160, 6470), (3235, 6320), (3950, 5176)]