19684880

素因数分解:

$2^4\times 5^1\times {\mathrm{241}}^1\times {\mathrm{1021}}^1$

素因数の和:1275

約数の個数: 40

約数和(自身を含む): 46002264

約数和(自身を除く): 26317384

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 241, 482, 964, 1021, 1205, 1928, 2042, 2410, 3856, 4084, 4820, 5105, 8168, 9640, 10210, 16336, 19280, 20420, 40840, 81680, 246061, 492122, 984244, 1230305, 1968488, 2460610, 3936976, 4921220, 9842440, 19684880]

約数ペア:

[(1, 19684880), (2, 9842440), (4, 4921220), (5, 3936976), (8, 2460610), (10, 1968488), (16, 1230305), (20, 984244), (40, 492122), (80, 246061), (241, 81680), (482, 40840), (964, 20420), (1021, 19280), (1205, 16336), (1928, 10210), (2042, 9640), (2410, 8168), (3856, 5105), (4084, 4820)]