21287840

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{83}}^1\times {\mathrm{229}}^1$

素因数の和:334

約数の個数: 96

約数和(自身を含む): 58423680

約数和(自身を除く): 37135840

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 70, 80, 83, 112, 140, 160, 166, 224, 229, 280, 332, 415, 458, 560, 581, 664, 830, 916, 1120, 1145, 1162, 1328, 1603, 1660, 1832, 2290, 2324, 2656, 2905, 3206, 3320, 3664, 4580, 4648, 5810, 6412, 6640, 7328, 8015, 9160, 9296, 11620, 12824, 13280, 16030, 18320, 18592, 19007, 23240, 25648, 32060, 36640, 38014, 46480, 51296, 64120, 76028, 92960, 95035, 128240, 133049, 152056, 190070, 256480, 266098, 304112, 380140, 532196, 608224, 665245, 760280, 1064392, 1330490, 1520560, 2128784, 2660980, 3041120, 4257568, 5321960, 10643920, 21287840]

約数ペア:

[(1, 21287840), (2, 10643920), (4, 5321960), (5, 4257568), (7, 3041120), (8, 2660980), (10, 2128784), (14, 1520560), (16, 1330490), (20, 1064392), (28, 760280), (32, 665245), (35, 608224), (40, 532196), (56, 380140), (70, 304112), (80, 266098), (83, 256480), (112, 190070), (140, 152056), (160, 133049), (166, 128240), (224, 95035), (229, 92960), (280, 76028), (332, 64120), (415, 51296), (458, 46480), (560, 38014), (581, 36640), (664, 32060), (830, 25648), (916, 23240), (1120, 19007), (1145, 18592), (1162, 18320), (1328, 16030), (1603, 13280), (1660, 12824), (1832, 11620), (2290, 9296), (2324, 9160), (2656, 8015), (2905, 7328), (3206, 6640), (3320, 6412), (3664, 5810), (4580, 4648)]