20921872

素因数分解:

$2^4\times {\mathrm{37}}^1\times {\mathrm{59}}^1\times {\mathrm{599}}^1$

素因数の和:703

約数の個数: 40

約数和(自身を含む): 42408000

約数和(自身を除く): 21486128

約数列:

[1, 2, 4, 8, 16, 37, 59, 74, 118, 148, 236, 296, 472, 592, 599, 944, 1198, 2183, 2396, 4366, 4792, 8732, 9584, 17464, 22163, 34928, 35341, 44326, 70682, 88652, 141364, 177304, 282728, 354608, 565456, 1307617, 2615234, 5230468, 10460936, 20921872]

約数ペア:

[(1, 20921872), (2, 10460936), (4, 5230468), (8, 2615234), (16, 1307617), (37, 565456), (59, 354608), (74, 282728), (118, 177304), (148, 141364), (236, 88652), (296, 70682), (472, 44326), (592, 35341), (599, 34928), (944, 22163), (1198, 17464), (2183, 9584), (2396, 8732), (4366, 4792)]