77654320

素因数分解:

$2^4\times 5^1\times {\mathrm{97}}^1\times {\mathrm{10007}}^1$

素因数の和:10117

約数の個数: 40

約数和(自身を含む): 182425824

約数和(自身を除く): 104771504

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 97, 194, 388, 485, 776, 970, 1552, 1940, 3880, 7760, 10007, 20014, 40028, 50035, 80056, 100070, 160112, 200140, 400280, 800560, 970679, 1941358, 3882716, 4853395, 7765432, 9706790, 15530864, 19413580, 38827160, 77654320]

約数ペア:

[(1, 77654320), (2, 38827160), (4, 19413580), (5, 15530864), (8, 9706790), (10, 7765432), (16, 4853395), (20, 3882716), (40, 1941358), (80, 970679), (97, 800560), (194, 400280), (388, 200140), (485, 160112), (776, 100070), (970, 80056), (1552, 50035), (1940, 40028), (3880, 20014), (7760, 10007)]