21462160

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{367}}^1$

素因数の和:440

約数の個数: 80

約数和(自身を含む): 54210816

約数和(自身を除く): 32748656

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 43, 68, 80, 85, 86, 136, 170, 172, 215, 272, 340, 344, 367, 430, 680, 688, 731, 734, 860, 1360, 1462, 1468, 1720, 1835, 2924, 2936, 3440, 3655, 3670, 5848, 5872, 6239, 7310, 7340, 11696, 12478, 14620, 14680, 15781, 24956, 29240, 29360, 31195, 31562, 49912, 58480, 62390, 63124, 78905, 99824, 124780, 126248, 157810, 249560, 252496, 268277, 315620, 499120, 536554, 631240, 1073108, 1262480, 1341385, 2146216, 2682770, 4292432, 5365540, 10731080, 21462160]

約数ペア:

[(1, 21462160), (2, 10731080), (4, 5365540), (5, 4292432), (8, 2682770), (10, 2146216), (16, 1341385), (17, 1262480), (20, 1073108), (34, 631240), (40, 536554), (43, 499120), (68, 315620), (80, 268277), (85, 252496), (86, 249560), (136, 157810), (170, 126248), (172, 124780), (215, 99824), (272, 78905), (340, 63124), (344, 62390), (367, 58480), (430, 49912), (680, 31562), (688, 31195), (731, 29360), (734, 29240), (860, 24956), (1360, 15781), (1462, 14680), (1468, 14620), (1720, 12478), (1835, 11696), (2924, 7340), (2936, 7310), (3440, 6239), (3655, 5872), (3670, 5848)]