421720

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{811}}^1$

素因数の和:835

約数の個数: 32

約数和(自身を含む): 1023120

約数和(自身を除く): 601400

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 811, 1622, 3244, 4055, 6488, 8110, 10543, 16220, 21086, 32440, 42172, 52715, 84344, 105430, 210860, 421720]

約数ペア:

[(1, 421720), (2, 210860), (4, 105430), (5, 84344), (8, 52715), (10, 42172), (13, 32440), (20, 21086), (26, 16220), (40, 10543), (52, 8110), (65, 6488), (104, 4055), (130, 3244), (260, 1622), (520, 811)]