20456560

素因数分解:

$2^4\times 5^1\times {\mathrm{37}}^1\times {\mathrm{6911}}^1$

素因数の和:6961

約数の個数: 40

約数和(自身を含む): 48854016

約数和(自身を除く): 28397456

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 37, 40, 74, 80, 148, 185, 296, 370, 592, 740, 1480, 2960, 6911, 13822, 27644, 34555, 55288, 69110, 110576, 138220, 255707, 276440, 511414, 552880, 1022828, 1278535, 2045656, 2557070, 4091312, 5114140, 10228280, 20456560]

約数ペア:

[(1, 20456560), (2, 10228280), (4, 5114140), (5, 4091312), (8, 2557070), (10, 2045656), (16, 1278535), (20, 1022828), (37, 552880), (40, 511414), (74, 276440), (80, 255707), (148, 138220), (185, 110576), (296, 69110), (370, 55288), (592, 34555), (740, 27644), (1480, 13822), (2960, 6911)]