398196640

素因数分解:

$2^5\times 5^1\times {\mathrm{97}}^1\times {\mathrm{25657}}^1$

素因数の和:25769

約数の個数: 48

約数和(自身を含む): 950474952

約数和(自身を除く): 552278312

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 97, 160, 194, 388, 485, 776, 970, 1552, 1940, 3104, 3880, 7760, 15520, 25657, 51314, 102628, 128285, 205256, 256570, 410512, 513140, 821024, 1026280, 2052560, 2488729, 4105120, 4977458, 9954916, 12443645, 19909832, 24887290, 39819664, 49774580, 79639328, 99549160, 199098320, 398196640]

約数ペア:

[(1, 398196640), (2, 199098320), (4, 99549160), (5, 79639328), (8, 49774580), (10, 39819664), (16, 24887290), (20, 19909832), (32, 12443645), (40, 9954916), (80, 4977458), (97, 4105120), (160, 2488729), (194, 2052560), (388, 1026280), (485, 821024), (776, 513140), (970, 410512), (1552, 256570), (1940, 205256), (3104, 128285), (3880, 102628), (7760, 51314), (15520, 25657)]