20478970

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{269}}^1\times {\mathrm{331}}^1$

素因数の和:630

約数の個数: 32

約数和(自身を含む): 38724480

約数和(自身を除く): 18245510

約数列:

[1, 2, 5, 10, 23, 46, 115, 230, 269, 331, 538, 662, 1345, 1655, 2690, 3310, 6187, 7613, 12374, 15226, 30935, 38065, 61870, 76130, 89039, 178078, 445195, 890390, 2047897, 4095794, 10239485, 20478970]

約数ペア:

[(1, 20478970), (2, 10239485), (5, 4095794), (10, 2047897), (23, 890390), (46, 445195), (115, 178078), (230, 89039), (269, 76130), (331, 61870), (538, 38065), (662, 30935), (1345, 15226), (1655, 12374), (2690, 7613), (3310, 6187)]