21500800

素因数分解:

$2^7\times 5^2\times {\mathrm{6719}}^1$

素因数の和:6743

約数の個数: 48

約数和(自身を含む): 53121600

約数和(自身を除く): 31620800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 128, 160, 200, 320, 400, 640, 800, 1600, 3200, 6719, 13438, 26876, 33595, 53752, 67190, 107504, 134380, 167975, 215008, 268760, 335950, 430016, 537520, 671900, 860032, 1075040, 1343800, 2150080, 2687600, 4300160, 5375200, 10750400, 21500800]

約数ペア:

[(1, 21500800), (2, 10750400), (4, 5375200), (5, 4300160), (8, 2687600), (10, 2150080), (16, 1343800), (20, 1075040), (25, 860032), (32, 671900), (40, 537520), (50, 430016), (64, 335950), (80, 268760), (100, 215008), (128, 167975), (160, 134380), (200, 107504), (320, 67190), (400, 53752), (640, 33595), (800, 26876), (1600, 13438), (3200, 6719)]