20984972

素因数分解:

$2^2\times {\mathrm{101}}^1\times {\mathrm{127}}^1\times {\mathrm{409}}^1$

素因数の和:641

約数の個数: 24

約数和(自身を含む): 37470720

約数和(自身を除く): 16485748

約数列:

[1, 2, 4, 101, 127, 202, 254, 404, 409, 508, 818, 1636, 12827, 25654, 41309, 51308, 51943, 82618, 103886, 165236, 207772, 5246243, 10492486, 20984972]

約数ペア:

[(1, 20984972), (2, 10492486), (4, 5246243), (101, 207772), (127, 165236), (202, 103886), (254, 82618), (404, 51943), (409, 51308), (508, 41309), (818, 25654), (1636, 12827)]