51221120

素因数分解:

$2^7\times 5^1\times {\mathrm{163}}^1\times {\mathrm{491}}^1$

素因数の和:673

約数の個数: 64

約数和(自身を含む): 123452640

約数和(自身を除く): 72231520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 163, 320, 326, 491, 640, 652, 815, 982, 1304, 1630, 1964, 2455, 2608, 3260, 3928, 4910, 5216, 6520, 7856, 9820, 10432, 13040, 15712, 19640, 20864, 26080, 31424, 39280, 52160, 62848, 78560, 80033, 104320, 157120, 160066, 314240, 320132, 400165, 640264, 800330, 1280528, 1600660, 2561056, 3201320, 5122112, 6402640, 10244224, 12805280, 25610560, 51221120]

約数ペア:

[(1, 51221120), (2, 25610560), (4, 12805280), (5, 10244224), (8, 6402640), (10, 5122112), (16, 3201320), (20, 2561056), (32, 1600660), (40, 1280528), (64, 800330), (80, 640264), (128, 400165), (160, 320132), (163, 314240), (320, 160066), (326, 157120), (491, 104320), (640, 80033), (652, 78560), (815, 62848), (982, 52160), (1304, 39280), (1630, 31424), (1964, 26080), (2455, 20864), (2608, 19640), (3260, 15712), (3928, 13040), (4910, 10432), (5216, 9820), (6520, 7856)]