20570320

素因数分解:

$2^4\times 5^1\times {\mathrm{389}}^1\times {\mathrm{661}}^1$

素因数の和:1063

約数の個数: 40

約数和(自身を含む): 48021480

約数和(自身を除く): 27451160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 389, 661, 778, 1322, 1556, 1945, 2644, 3112, 3305, 3890, 5288, 6224, 6610, 7780, 10576, 13220, 15560, 26440, 31120, 52880, 257129, 514258, 1028516, 1285645, 2057032, 2571290, 4114064, 5142580, 10285160, 20570320]

約数ペア:

[(1, 20570320), (2, 10285160), (4, 5142580), (5, 4114064), (8, 2571290), (10, 2057032), (16, 1285645), (20, 1028516), (40, 514258), (80, 257129), (389, 52880), (661, 31120), (778, 26440), (1322, 15560), (1556, 13220), (1945, 10576), (2644, 7780), (3112, 6610), (3305, 6224), (3890, 5288)]