21641240

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{6079}}^1$

素因数の和:6179

約数の個数: 32

約数和(自身を含む): 49248000

約数和(自身を除く): 27606760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 6079, 12158, 24316, 30395, 48632, 60790, 121580, 243160, 541031, 1082062, 2164124, 2705155, 4328248, 5410310, 10820620, 21641240]

約数ペア:

[(1, 21641240), (2, 10820620), (4, 5410310), (5, 4328248), (8, 2705155), (10, 2164124), (20, 1082062), (40, 541031), (89, 243160), (178, 121580), (356, 60790), (445, 48632), (712, 30395), (890, 24316), (1780, 12158), (3560, 6079)]