21720016

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{1699}}^1$

素因数の和:1771

約数の個数: 40

約数和(自身を含む): 45532800

約数和(自身を除く): 23812784

約数列:

[1, 2, 4, 8, 16, 17, 34, 47, 68, 94, 136, 188, 272, 376, 752, 799, 1598, 1699, 3196, 3398, 6392, 6796, 12784, 13592, 27184, 28883, 57766, 79853, 115532, 159706, 231064, 319412, 462128, 638824, 1277648, 1357501, 2715002, 5430004, 10860008, 21720016]

約数ペア:

[(1, 21720016), (2, 10860008), (4, 5430004), (8, 2715002), (16, 1357501), (17, 1277648), (34, 638824), (47, 462128), (68, 319412), (94, 231064), (136, 159706), (188, 115532), (272, 79853), (376, 57766), (752, 28883), (799, 27184), (1598, 13592), (1699, 12784), (3196, 6796), (3398, 6392)]