25780000

素因数分解:

$2^5\times 5^4\times {\mathrm{1289}}^1$

素因数の和:1319

約数の個数: 60

約数和(自身を含む): 63471870

約数和(自身を除く): 37691870

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 200, 250, 400, 500, 625, 800, 1000, 1250, 1289, 2000, 2500, 2578, 4000, 5000, 5156, 6445, 10000, 10312, 12890, 20000, 20624, 25780, 32225, 41248, 51560, 64450, 103120, 128900, 161125, 206240, 257800, 322250, 515600, 644500, 805625, 1031200, 1289000, 1611250, 2578000, 3222500, 5156000, 6445000, 12890000, 25780000]

約数ペア:

[(1, 25780000), (2, 12890000), (4, 6445000), (5, 5156000), (8, 3222500), (10, 2578000), (16, 1611250), (20, 1289000), (25, 1031200), (32, 805625), (40, 644500), (50, 515600), (80, 322250), (100, 257800), (125, 206240), (160, 161125), (200, 128900), (250, 103120), (400, 64450), (500, 51560), (625, 41248), (800, 32225), (1000, 25780), (1250, 20624), (1289, 20000), (2000, 12890), (2500, 10312), (2578, 10000), (4000, 6445), (5000, 5156)]