20856854780

素因数分解:

$2^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{79}}^1\times {\mathrm{197023}}^1$

素因数の和:197178

約数の個数: 48

約数和(自身を含む): 45016043520

約数和(自身を除く): 24159188740

約数列:

[1, 2, 4, 5, 10, 20, 67, 79, 134, 158, 268, 316, 335, 395, 670, 790, 1340, 1580, 5293, 10586, 21172, 26465, 52930, 105860, 197023, 394046, 788092, 985115, 1970230, 3940460, 13200541, 15564817, 26401082, 31129634, 52802164, 62259268, 66002705, 77824085, 132005410, 155648170, 264010820, 311296340, 1042842739, 2085685478, 4171370956, 5214213695, 10428427390, 20856854780]

約数ペア:

[(1, 20856854780), (2, 10428427390), (4, 5214213695), (5, 4171370956), (10, 2085685478), (20, 1042842739), (67, 311296340), (79, 264010820), (134, 155648170), (158, 132005410), (268, 77824085), (316, 66002705), (335, 62259268), (395, 52802164), (670, 31129634), (790, 26401082), (1340, 15564817), (1580, 13200541), (5293, 3940460), (10586, 1970230), (21172, 985115), (26465, 788092), (52930, 394046), (105860, 197023)]