21651876

素因数分解:

$2^2\times 3^2\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{197}}^1$

素因数の和:321

約数の個数: 72

約数和(自身を含む): 57081024

約数和(自身を除く): 35429148

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 43, 71, 86, 129, 142, 172, 197, 213, 258, 284, 387, 394, 426, 516, 591, 639, 774, 788, 852, 1182, 1278, 1548, 1773, 2364, 2556, 3053, 3546, 6106, 7092, 8471, 9159, 12212, 13987, 16942, 18318, 25413, 27477, 27974, 33884, 36636, 41961, 50826, 54954, 55948, 76239, 83922, 101652, 109908, 125883, 152478, 167844, 251766, 304956, 503532, 601441, 1202882, 1804323, 2405764, 3608646, 5412969, 7217292, 10825938, 21651876]

約数ペア:

[(1, 21651876), (2, 10825938), (3, 7217292), (4, 5412969), (6, 3608646), (9, 2405764), (12, 1804323), (18, 1202882), (36, 601441), (43, 503532), (71, 304956), (86, 251766), (129, 167844), (142, 152478), (172, 125883), (197, 109908), (213, 101652), (258, 83922), (284, 76239), (387, 55948), (394, 54954), (426, 50826), (516, 41961), (591, 36636), (639, 33884), (774, 27974), (788, 27477), (852, 25413), (1182, 18318), (1278, 16942), (1548, 13987), (1773, 12212), (2364, 9159), (2556, 8471), (3053, 7092), (3546, 6106)]