53281240

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1\times {\mathrm{257}}^1$

素因数の和:412

約数の個数: 64

約数和(自身を含む): 123716160

約数和(自身を除く): 70434920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 73, 142, 146, 257, 284, 292, 355, 365, 514, 568, 584, 710, 730, 1028, 1285, 1420, 1460, 2056, 2570, 2840, 2920, 5140, 5183, 10280, 10366, 18247, 18761, 20732, 25915, 36494, 37522, 41464, 51830, 72988, 75044, 91235, 93805, 103660, 145976, 150088, 182470, 187610, 207320, 364940, 375220, 729880, 750440, 1332031, 2664062, 5328124, 6660155, 10656248, 13320310, 26640620, 53281240]

約数ペア:

[(1, 53281240), (2, 26640620), (4, 13320310), (5, 10656248), (8, 6660155), (10, 5328124), (20, 2664062), (40, 1332031), (71, 750440), (73, 729880), (142, 375220), (146, 364940), (257, 207320), (284, 187610), (292, 182470), (355, 150088), (365, 145976), (514, 103660), (568, 93805), (584, 91235), (710, 75044), (730, 72988), (1028, 51830), (1285, 41464), (1420, 37522), (1460, 36494), (2056, 25915), (2570, 20732), (2840, 18761), (2920, 18247), (5140, 10366), (5183, 10280)]