388645520

素因数分解:

$2^4\times 5^1\times {\mathrm{631}}^1\times {\mathrm{7699}}^1$

素因数の和:8343

約数の個数: 40

約数和(自身を含む): 905150400

約数和(自身を除く): 516504880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 631, 1262, 2524, 3155, 5048, 6310, 7699, 10096, 12620, 15398, 25240, 30796, 38495, 50480, 61592, 76990, 123184, 153980, 307960, 615920, 4858069, 9716138, 19432276, 24290345, 38864552, 48580690, 77729104, 97161380, 194322760, 388645520]

約数ペア:

[(1, 388645520), (2, 194322760), (4, 97161380), (5, 77729104), (8, 48580690), (10, 38864552), (16, 24290345), (20, 19432276), (40, 9716138), (80, 4858069), (631, 615920), (1262, 307960), (2524, 153980), (3155, 123184), (5048, 76990), (6310, 61592), (7699, 50480), (10096, 38495), (12620, 30796), (15398, 25240)]