21023260

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{67}}^1\times {\mathrm{541}}^1$

素因数の和:646

約数の個数: 48

約数和(自身を含む): 46438560

約数和(自身を除く): 25415300

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 67, 116, 134, 145, 268, 290, 335, 541, 580, 670, 1082, 1340, 1943, 2164, 2705, 3886, 5410, 7772, 9715, 10820, 15689, 19430, 31378, 36247, 38860, 62756, 72494, 78445, 144988, 156890, 181235, 313780, 362470, 724940, 1051163, 2102326, 4204652, 5255815, 10511630, 21023260]

約数ペア:

[(1, 21023260), (2, 10511630), (4, 5255815), (5, 4204652), (10, 2102326), (20, 1051163), (29, 724940), (58, 362470), (67, 313780), (116, 181235), (134, 156890), (145, 144988), (268, 78445), (290, 72494), (335, 62756), (541, 38860), (580, 36247), (670, 31378), (1082, 19430), (1340, 15689), (1943, 10820), (2164, 9715), (2705, 7772), (3886, 5410)]