81040000

素因数分解:

$2^7\times 5^4\times {\mathrm{1013}}^1$

素因数の和:1047

約数の個数: 80

約数和(自身を含む): 201943170

約数和(自身を除く): 120903170

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 128, 160, 200, 250, 320, 400, 500, 625, 640, 800, 1000, 1013, 1250, 1600, 2000, 2026, 2500, 3200, 4000, 4052, 5000, 5065, 8000, 8104, 10000, 10130, 16000, 16208, 20000, 20260, 25325, 32416, 40000, 40520, 50650, 64832, 80000, 81040, 101300, 126625, 129664, 162080, 202600, 253250, 324160, 405200, 506500, 633125, 648320, 810400, 1013000, 1266250, 1620800, 2026000, 2532500, 3241600, 4052000, 5065000, 8104000, 10130000, 16208000, 20260000, 40520000, 81040000]

約数ペア:

[(1, 81040000), (2, 40520000), (4, 20260000), (5, 16208000), (8, 10130000), (10, 8104000), (16, 5065000), (20, 4052000), (25, 3241600), (32, 2532500), (40, 2026000), (50, 1620800), (64, 1266250), (80, 1013000), (100, 810400), (125, 648320), (128, 633125), (160, 506500), (200, 405200), (250, 324160), (320, 253250), (400, 202600), (500, 162080), (625, 129664), (640, 126625), (800, 101300), (1000, 81040), (1013, 80000), (1250, 64832), (1600, 50650), (2000, 40520), (2026, 40000), (2500, 32416), (3200, 25325), (4000, 20260), (4052, 20000), (5000, 16208), (5065, 16000), (8000, 10130), (8104, 10000)]