20890880

素因数分解:

$2^8\times 5^1\times {\mathrm{19}}^1\times {\mathrm{859}}^1$

素因数の和:899

約数の個数: 72

約数和(自身を含む): 52735200

約数和(自身を除く): 31844320

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 64, 76, 80, 95, 128, 152, 160, 190, 256, 304, 320, 380, 608, 640, 760, 859, 1216, 1280, 1520, 1718, 2432, 3040, 3436, 4295, 4864, 6080, 6872, 8590, 12160, 13744, 16321, 17180, 24320, 27488, 32642, 34360, 54976, 65284, 68720, 81605, 109952, 130568, 137440, 163210, 219904, 261136, 274880, 326420, 522272, 549760, 652840, 1044544, 1099520, 1305680, 2089088, 2611360, 4178176, 5222720, 10445440, 20890880]

約数ペア:

[(1, 20890880), (2, 10445440), (4, 5222720), (5, 4178176), (8, 2611360), (10, 2089088), (16, 1305680), (19, 1099520), (20, 1044544), (32, 652840), (38, 549760), (40, 522272), (64, 326420), (76, 274880), (80, 261136), (95, 219904), (128, 163210), (152, 137440), (160, 130568), (190, 109952), (256, 81605), (304, 68720), (320, 65284), (380, 54976), (608, 34360), (640, 32642), (760, 27488), (859, 24320), (1216, 17180), (1280, 16321), (1520, 13744), (1718, 12160), (2432, 8590), (3040, 6872), (3436, 6080), (4295, 4864)]