65638400

素因数分解:

$2^{12}\times 5^2\times {\mathrm{641}}^1$

素因数の和:675

約数の個数: 78

約数和(自身を含む): 163017282

約数和(自身を除く): 97378882

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 128, 160, 200, 256, 320, 400, 512, 640, 641, 800, 1024, 1280, 1282, 1600, 2048, 2560, 2564, 3200, 3205, 4096, 5120, 5128, 6400, 6410, 10240, 10256, 12800, 12820, 16025, 20480, 20512, 25600, 25640, 32050, 41024, 51200, 51280, 64100, 82048, 102400, 102560, 128200, 164096, 205120, 256400, 328192, 410240, 512800, 656384, 820480, 1025600, 1312768, 1640960, 2051200, 2625536, 3281920, 4102400, 6563840, 8204800, 13127680, 16409600, 32819200, 65638400]

約数ペア:

[(1, 65638400), (2, 32819200), (4, 16409600), (5, 13127680), (8, 8204800), (10, 6563840), (16, 4102400), (20, 3281920), (25, 2625536), (32, 2051200), (40, 1640960), (50, 1312768), (64, 1025600), (80, 820480), (100, 656384), (128, 512800), (160, 410240), (200, 328192), (256, 256400), (320, 205120), (400, 164096), (512, 128200), (640, 102560), (641, 102400), (800, 82048), (1024, 64100), (1280, 51280), (1282, 51200), (1600, 41024), (2048, 32050), (2560, 25640), (2564, 25600), (3200, 20512), (3205, 20480), (4096, 16025), (5120, 12820), (5128, 12800), (6400, 10256), (6410, 10240)]