21442460

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{82471}}^1$

素因数の和:82493

約数の個数: 24

約数和(自身を含む): 48493536

約数和(自身を除く): 27051076

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 82471, 164942, 329884, 412355, 824710, 1072123, 1649420, 2144246, 4288492, 5360615, 10721230, 21442460]

約数ペア:

[(1, 21442460), (2, 10721230), (4, 5360615), (5, 4288492), (10, 2144246), (13, 1649420), (20, 1072123), (26, 824710), (52, 412355), (65, 329884), (130, 164942), (260, 82471)]