648016

素因数分解:

$2^4\times {\mathrm{101}}^1\times {\mathrm{401}}^1$

素因数の和:510

約数の個数: 20

約数和(自身を含む): 1271124

約数和(自身を除く): 623108

約数列:

[1, 2, 4, 8, 16, 101, 202, 401, 404, 802, 808, 1604, 1616, 3208, 6416, 40501, 81002, 162004, 324008, 648016]

約数ペア:

[(1, 648016), (2, 324008), (4, 162004), (8, 81002), (16, 40501), (101, 6416), (202, 3208), (401, 1616), (404, 1604), (802, 808)]