21169760

素因数分解:

$2^5\times 5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{181}}^1$

素因数の和:256

約数の個数: 96

約数和(自身を含む): 54486432

約数和(自身を除く): 33316672

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 43, 68, 80, 85, 86, 136, 160, 170, 172, 181, 215, 272, 340, 344, 362, 430, 544, 680, 688, 724, 731, 860, 905, 1360, 1376, 1448, 1462, 1720, 1810, 2720, 2896, 2924, 3077, 3440, 3620, 3655, 5792, 5848, 6154, 6880, 7240, 7310, 7783, 11696, 12308, 14480, 14620, 15385, 15566, 23392, 24616, 28960, 29240, 30770, 31132, 38915, 49232, 58480, 61540, 62264, 77830, 98464, 116960, 123080, 124528, 132311, 155660, 246160, 249056, 264622, 311320, 492320, 529244, 622640, 661555, 1058488, 1245280, 1323110, 2116976, 2646220, 4233952, 5292440, 10584880, 21169760]

約数ペア:

[(1, 21169760), (2, 10584880), (4, 5292440), (5, 4233952), (8, 2646220), (10, 2116976), (16, 1323110), (17, 1245280), (20, 1058488), (32, 661555), (34, 622640), (40, 529244), (43, 492320), (68, 311320), (80, 264622), (85, 249056), (86, 246160), (136, 155660), (160, 132311), (170, 124528), (172, 123080), (181, 116960), (215, 98464), (272, 77830), (340, 62264), (344, 61540), (362, 58480), (430, 49232), (544, 38915), (680, 31132), (688, 30770), (724, 29240), (731, 28960), (860, 24616), (905, 23392), (1360, 15566), (1376, 15385), (1448, 14620), (1462, 14480), (1720, 12308), (1810, 11696), (2720, 7783), (2896, 7310), (2924, 7240), (3077, 6880), (3440, 6154), (3620, 5848), (3655, 5792)]