21115160

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{1297}}^1$

素因数の和:1356

約数の個数: 64

約数和(自身を含む): 53269920

約数和(自身を除く): 32154760

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 37, 40, 44, 55, 74, 88, 110, 148, 185, 220, 296, 370, 407, 440, 740, 814, 1297, 1480, 1628, 2035, 2594, 3256, 4070, 5188, 6485, 8140, 10376, 12970, 14267, 16280, 25940, 28534, 47989, 51880, 57068, 71335, 95978, 114136, 142670, 191956, 239945, 285340, 383912, 479890, 527879, 570680, 959780, 1055758, 1919560, 2111516, 2639395, 4223032, 5278790, 10557580, 21115160]

約数ペア:

[(1, 21115160), (2, 10557580), (4, 5278790), (5, 4223032), (8, 2639395), (10, 2111516), (11, 1919560), (20, 1055758), (22, 959780), (37, 570680), (40, 527879), (44, 479890), (55, 383912), (74, 285340), (88, 239945), (110, 191956), (148, 142670), (185, 114136), (220, 95978), (296, 71335), (370, 57068), (407, 51880), (440, 47989), (740, 28534), (814, 25940), (1297, 16280), (1480, 14267), (1628, 12970), (2035, 10376), (2594, 8140), (3256, 6485), (4070, 5188)]