21331520

素因数分解:

$2^6\times 5^1\times 7^1\times {\mathrm{89}}^1\times {\mathrm{107}}^1$

素因数の和:220

約数の個数: 112

約数和(自身を含む): 59253120

約数和(自身を除く): 37921600

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 64, 70, 80, 89, 107, 112, 140, 160, 178, 214, 224, 280, 320, 356, 428, 445, 448, 535, 560, 623, 712, 749, 856, 890, 1070, 1120, 1246, 1424, 1498, 1712, 1780, 2140, 2240, 2492, 2848, 2996, 3115, 3424, 3560, 3745, 4280, 4984, 5696, 5992, 6230, 6848, 7120, 7490, 8560, 9523, 9968, 11984, 12460, 14240, 14980, 17120, 19046, 19936, 23968, 24920, 28480, 29960, 34240, 38092, 39872, 47615, 47936, 49840, 59920, 66661, 76184, 95230, 99680, 119840, 133322, 152368, 190460, 199360, 239680, 266644, 304736, 333305, 380920, 533288, 609472, 666610, 761840, 1066576, 1333220, 1523680, 2133152, 2666440, 3047360, 4266304, 5332880, 10665760, 21331520]

約数ペア:

[(1, 21331520), (2, 10665760), (4, 5332880), (5, 4266304), (7, 3047360), (8, 2666440), (10, 2133152), (14, 1523680), (16, 1333220), (20, 1066576), (28, 761840), (32, 666610), (35, 609472), (40, 533288), (56, 380920), (64, 333305), (70, 304736), (80, 266644), (89, 239680), (107, 199360), (112, 190460), (140, 152368), (160, 133322), (178, 119840), (214, 99680), (224, 95230), (280, 76184), (320, 66661), (356, 59920), (428, 49840), (445, 47936), (448, 47615), (535, 39872), (560, 38092), (623, 34240), (712, 29960), (749, 28480), (856, 24920), (890, 23968), (1070, 19936), (1120, 19046), (1246, 17120), (1424, 14980), (1498, 14240), (1712, 12460), (1780, 11984), (2140, 9968), (2240, 9523), (2492, 8560), (2848, 7490), (2996, 7120), (3115, 6848), (3424, 6230), (3560, 5992), (3745, 5696), (4280, 4984)]