81301970

素因数分解:

$2^1\times 5^1\times {\mathrm{101}}^2\times {\mathrm{797}}^1$

素因数の和:1006

約数の個数: 24

約数和(自身を含む): 147992292

約数和(自身を除く): 66690322

約数列:

[1, 2, 5, 10, 101, 202, 505, 797, 1010, 1594, 3985, 7970, 10201, 20402, 51005, 80497, 102010, 160994, 402485, 804970, 8130197, 16260394, 40650985, 81301970]

約数ペア:

[(1, 81301970), (2, 40650985), (5, 16260394), (10, 8130197), (101, 804970), (202, 402485), (505, 160994), (797, 102010), (1010, 80497), (1594, 51005), (3985, 20402), (7970, 10201)]