25640000

素因数分解:

$2^6\times 5^4\times {\mathrm{641}}^1$

素因数の和:673

約数の個数: 70

約数和(自身を含む): 63678054

約数和(自身を除く): 38038054

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 160, 200, 250, 320, 400, 500, 625, 641, 800, 1000, 1250, 1282, 1600, 2000, 2500, 2564, 3205, 4000, 5000, 5128, 6410, 8000, 10000, 10256, 12820, 16025, 20000, 20512, 25640, 32050, 40000, 41024, 51280, 64100, 80125, 102560, 128200, 160250, 205120, 256400, 320500, 400625, 512800, 641000, 801250, 1025600, 1282000, 1602500, 2564000, 3205000, 5128000, 6410000, 12820000, 25640000]

約数ペア:

[(1, 25640000), (2, 12820000), (4, 6410000), (5, 5128000), (8, 3205000), (10, 2564000), (16, 1602500), (20, 1282000), (25, 1025600), (32, 801250), (40, 641000), (50, 512800), (64, 400625), (80, 320500), (100, 256400), (125, 205120), (160, 160250), (200, 128200), (250, 102560), (320, 80125), (400, 64100), (500, 51280), (625, 41024), (641, 40000), (800, 32050), (1000, 25640), (1250, 20512), (1282, 20000), (1600, 16025), (2000, 12820), (2500, 10256), (2564, 10000), (3205, 8000), (4000, 6410), (5000, 5128)]