21191344

素因数分解:

$2^4\times {\mathrm{29}}^1\times {\mathrm{109}}^1\times {\mathrm{419}}^1$

素因数の和:565

約数の個数: 40

約数和(自身を含む): 42966000

約数和(自身を除く): 21774656

約数列:

[1, 2, 4, 8, 16, 29, 58, 109, 116, 218, 232, 419, 436, 464, 838, 872, 1676, 1744, 3161, 3352, 6322, 6704, 12151, 12644, 24302, 25288, 45671, 48604, 50576, 91342, 97208, 182684, 194416, 365368, 730736, 1324459, 2648918, 5297836, 10595672, 21191344]

約数ペア:

[(1, 21191344), (2, 10595672), (4, 5297836), (8, 2648918), (16, 1324459), (29, 730736), (58, 365368), (109, 194416), (116, 182684), (218, 97208), (232, 91342), (419, 50576), (436, 48604), (464, 45671), (838, 25288), (872, 24302), (1676, 12644), (1744, 12151), (3161, 6704), (3352, 6322)]