20790791720

素因数分解:

$2^3\times 5^1\times {\mathrm{263}}^1\times {\mathrm{547}}^1\times {\mathrm{3613}}^1$

素因数の和:4434

約数の個数: 64

約数和(自身を含む): 47056014720

約数和(自身を除く): 26265223000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 263, 526, 547, 1052, 1094, 1315, 2104, 2188, 2630, 2735, 3613, 4376, 5260, 5470, 7226, 10520, 10940, 14452, 18065, 21880, 28904, 36130, 72260, 143861, 144520, 287722, 575444, 719305, 950219, 1150888, 1438610, 1900438, 1976311, 2877220, 3800876, 3952622, 4751095, 5754440, 7601752, 7905244, 9502190, 9881555, 15810488, 19004380, 19763110, 38008760, 39526220, 79052440, 519769793, 1039539586, 2079079172, 2598848965, 4158158344, 5197697930, 10395395860, 20790791720]

約数ペア:

[(1, 20790791720), (2, 10395395860), (4, 5197697930), (5, 4158158344), (8, 2598848965), (10, 2079079172), (20, 1039539586), (40, 519769793), (263, 79052440), (526, 39526220), (547, 38008760), (1052, 19763110), (1094, 19004380), (1315, 15810488), (2104, 9881555), (2188, 9502190), (2630, 7905244), (2735, 7601752), (3613, 5754440), (4376, 4751095), (5260, 3952622), (5470, 3800876), (7226, 2877220), (10520, 1976311), (10940, 1900438), (14452, 1438610), (18065, 1150888), (21880, 950219), (28904, 719305), (36130, 575444), (72260, 287722), (143861, 144520)]