21371570

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{59}}^1\times {\mathrm{89}}^1$

素因数の和:203

約数の個数: 64

約数和(自身を含む): 44323200

約数和(自身を除く): 22951630

約数列:

[1, 2, 5, 10, 11, 22, 37, 55, 59, 74, 89, 110, 118, 178, 185, 295, 370, 407, 445, 590, 649, 814, 890, 979, 1298, 1958, 2035, 2183, 3245, 3293, 4070, 4366, 4895, 5251, 6490, 6586, 9790, 10502, 10915, 16465, 21830, 24013, 26255, 32930, 36223, 48026, 52510, 57761, 72446, 115522, 120065, 181115, 194287, 240130, 288805, 362230, 388574, 577610, 971435, 1942870, 2137157, 4274314, 10685785, 21371570]

約数ペア:

[(1, 21371570), (2, 10685785), (5, 4274314), (10, 2137157), (11, 1942870), (22, 971435), (37, 577610), (55, 388574), (59, 362230), (74, 288805), (89, 240130), (110, 194287), (118, 181115), (178, 120065), (185, 115522), (295, 72446), (370, 57761), (407, 52510), (445, 48026), (590, 36223), (649, 32930), (814, 26255), (890, 24013), (979, 21830), (1298, 16465), (1958, 10915), (2035, 10502), (2183, 9790), (3245, 6586), (3293, 6490), (4070, 5251), (4366, 4895)]