20974540

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^3\times {\mathrm{43}}^1$

素因数の和:139

約数の個数: 48

約数和(自身を含む): 46680480

約数和(自身を除く): 25705940

約数列:

[1, 2, 4, 5, 10, 20, 29, 43, 58, 86, 116, 145, 172, 215, 290, 430, 580, 841, 860, 1247, 1682, 2494, 3364, 4205, 4988, 6235, 8410, 12470, 16820, 24389, 24940, 36163, 48778, 72326, 97556, 121945, 144652, 180815, 243890, 361630, 487780, 723260, 1048727, 2097454, 4194908, 5243635, 10487270, 20974540]

約数ペア:

[(1, 20974540), (2, 10487270), (4, 5243635), (5, 4194908), (10, 2097454), (20, 1048727), (29, 723260), (43, 487780), (58, 361630), (86, 243890), (116, 180815), (145, 144652), (172, 121945), (215, 97556), (290, 72326), (430, 48778), (580, 36163), (841, 24940), (860, 24389), (1247, 16820), (1682, 12470), (2494, 8410), (3364, 6235), (4205, 4988)]