20997592

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{383}}^1$

素因数の和:496

約数の個数: 64

約数和(自身を含む): 49766400

約数和(自身を除く): 28768808

約数列:

[1, 2, 4, 7, 8, 11, 14, 22, 28, 44, 56, 77, 88, 89, 154, 178, 308, 356, 383, 616, 623, 712, 766, 979, 1246, 1532, 1958, 2492, 2681, 3064, 3916, 4213, 4984, 5362, 6853, 7832, 8426, 10724, 13706, 16852, 21448, 27412, 29491, 33704, 34087, 54824, 58982, 68174, 117964, 136348, 235928, 238609, 272696, 374957, 477218, 749914, 954436, 1499828, 1908872, 2624699, 2999656, 5249398, 10498796, 20997592]

約数ペア:

[(1, 20997592), (2, 10498796), (4, 5249398), (7, 2999656), (8, 2624699), (11, 1908872), (14, 1499828), (22, 954436), (28, 749914), (44, 477218), (56, 374957), (77, 272696), (88, 238609), (89, 235928), (154, 136348), (178, 117964), (308, 68174), (356, 58982), (383, 54824), (616, 34087), (623, 33704), (712, 29491), (766, 27412), (979, 21448), (1246, 16852), (1532, 13706), (1958, 10724), (2492, 8426), (2681, 7832), (3064, 6853), (3916, 5362), (4213, 4984)]