128131840

素因数分解:

$2^8\times 5^1\times {\mathrm{100103}}^1$

素因数の和:100124

約数の個数: 36

約数和(自身を含む): 306918864

約数和(自身を除く): 178787024

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 100103, 200206, 400412, 500515, 800824, 1001030, 1601648, 2002060, 3203296, 4004120, 6406592, 8008240, 12813184, 16016480, 25626368, 32032960, 64065920, 128131840]

約数ペア:

[(1, 128131840), (2, 64065920), (4, 32032960), (5, 25626368), (8, 16016480), (10, 12813184), (16, 8008240), (20, 6406592), (32, 4004120), (40, 3203296), (64, 2002060), (80, 1601648), (128, 1001030), (160, 800824), (256, 500515), (320, 400412), (640, 200206), (1280, 100103)]