638020

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{73}}^1$

素因数の和:124

約数の個数: 48

約数和(自身を含む): 1491840

約数和(自身を除く): 853820

約数列:

[1, 2, 4, 5, 10, 19, 20, 23, 38, 46, 73, 76, 92, 95, 115, 146, 190, 230, 292, 365, 380, 437, 460, 730, 874, 1387, 1460, 1679, 1748, 2185, 2774, 3358, 4370, 5548, 6716, 6935, 8395, 8740, 13870, 16790, 27740, 31901, 33580, 63802, 127604, 159505, 319010, 638020]

約数ペア:

[(1, 638020), (2, 319010), (4, 159505), (5, 127604), (10, 63802), (19, 33580), (20, 31901), (23, 27740), (38, 16790), (46, 13870), (73, 8740), (76, 8395), (92, 6935), (95, 6716), (115, 5548), (146, 4370), (190, 3358), (230, 2774), (292, 2185), (365, 1748), (380, 1679), (437, 1460), (460, 1387), (730, 874)]