20871756

素因数分解:

$2^2\times 3^5\times {\mathrm{109}}^1\times {\mathrm{197}}^1$

素因数の和:325

約数の個数: 72

約数和(自身を含む): 55495440

約数和(自身を除く): 34623684

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 81, 108, 109, 162, 197, 218, 243, 324, 327, 394, 436, 486, 591, 654, 788, 972, 981, 1182, 1308, 1773, 1962, 2364, 2943, 3546, 3924, 5319, 5886, 7092, 8829, 10638, 11772, 15957, 17658, 21276, 21473, 26487, 31914, 35316, 42946, 47871, 52974, 63828, 64419, 85892, 95742, 105948, 128838, 191484, 193257, 257676, 386514, 579771, 773028, 1159542, 1739313, 2319084, 3478626, 5217939, 6957252, 10435878, 20871756]

約数ペア:

[(1, 20871756), (2, 10435878), (3, 6957252), (4, 5217939), (6, 3478626), (9, 2319084), (12, 1739313), (18, 1159542), (27, 773028), (36, 579771), (54, 386514), (81, 257676), (108, 193257), (109, 191484), (162, 128838), (197, 105948), (218, 95742), (243, 85892), (324, 64419), (327, 63828), (394, 52974), (436, 47871), (486, 42946), (591, 35316), (654, 31914), (788, 26487), (972, 21473), (981, 21276), (1182, 17658), (1308, 15957), (1773, 11772), (1962, 10638), (2364, 8829), (2943, 7092), (3546, 5886), (3924, 5319)]