18995680

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{251}}^1$

素因数の和:320

約数の個数: 96

約数和(自身を含む): 50295168

約数和(自身を除く): 31299488

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 43, 44, 55, 80, 86, 88, 110, 160, 172, 176, 215, 220, 251, 344, 352, 430, 440, 473, 502, 688, 860, 880, 946, 1004, 1255, 1376, 1720, 1760, 1892, 2008, 2365, 2510, 2761, 3440, 3784, 4016, 4730, 5020, 5522, 6880, 7568, 8032, 9460, 10040, 10793, 11044, 13805, 15136, 18920, 20080, 21586, 22088, 27610, 37840, 40160, 43172, 44176, 53965, 55220, 75680, 86344, 88352, 107930, 110440, 118723, 172688, 215860, 220880, 237446, 345376, 431720, 441760, 474892, 593615, 863440, 949784, 1187230, 1726880, 1899568, 2374460, 3799136, 4748920, 9497840, 18995680]

約数ペア:

[(1, 18995680), (2, 9497840), (4, 4748920), (5, 3799136), (8, 2374460), (10, 1899568), (11, 1726880), (16, 1187230), (20, 949784), (22, 863440), (32, 593615), (40, 474892), (43, 441760), (44, 431720), (55, 345376), (80, 237446), (86, 220880), (88, 215860), (110, 172688), (160, 118723), (172, 110440), (176, 107930), (215, 88352), (220, 86344), (251, 75680), (344, 55220), (352, 53965), (430, 44176), (440, 43172), (473, 40160), (502, 37840), (688, 27610), (860, 22088), (880, 21586), (946, 20080), (1004, 18920), (1255, 15136), (1376, 13805), (1720, 11044), (1760, 10793), (1892, 10040), (2008, 9460), (2365, 8032), (2510, 7568), (2761, 6880), (3440, 5522), (3784, 5020), (4016, 4730)]