81723320

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{291869}}^1$

素因数の和:291887

約数の個数: 32

約数和(自身を含む): 210146400

約数和(自身を除く): 128423080

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 291869, 583738, 1167476, 1459345, 2043083, 2334952, 2918690, 4086166, 5837380, 8172332, 10215415, 11674760, 16344664, 20430830, 40861660, 81723320]

約数ペア:

[(1, 81723320), (2, 40861660), (4, 20430830), (5, 16344664), (7, 11674760), (8, 10215415), (10, 8172332), (14, 5837380), (20, 4086166), (28, 2918690), (35, 2334952), (40, 2043083), (56, 1459345), (70, 1167476), (140, 583738), (280, 291869)]