686920

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1321}}^1$

素因数の和:1345

約数の個数: 32

約数和(自身を含む): 1665720

約数和(自身を除く): 978800

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 1321, 2642, 5284, 6605, 10568, 13210, 17173, 26420, 34346, 52840, 68692, 85865, 137384, 171730, 343460, 686920]

約数ペア:

[(1, 686920), (2, 343460), (4, 171730), (5, 137384), (8, 85865), (10, 68692), (13, 52840), (20, 34346), (26, 26420), (40, 17173), (52, 13210), (65, 10568), (104, 6605), (130, 5284), (260, 2642), (520, 1321)]