12721120

素因数分解:

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

素因数の和:144

約数の個数: 48

約数和(自身を含む): 30769200

約数和(自身を除く): 18048080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 43, 80, 86, 160, 172, 215, 344, 430, 688, 860, 1376, 1720, 1849, 3440, 3698, 6880, 7396, 9245, 14792, 18490, 29584, 36980, 59168, 73960, 79507, 147920, 159014, 295840, 318028, 397535, 636056, 795070, 1272112, 1590140, 2544224, 3180280, 6360560, 12721120]

約数ペア:

[(1, 12721120), (2, 6360560), (4, 3180280), (5, 2544224), (8, 1590140), (10, 1272112), (16, 795070), (20, 636056), (32, 397535), (40, 318028), (43, 295840), (80, 159014), (86, 147920), (160, 79507), (172, 73960), (215, 59168), (344, 36980), (430, 29584), (688, 18490), (860, 14792), (1376, 9245), (1720, 7396), (1849, 6880), (3440, 3698)]