18990020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{101}}^1$

素因数の和:213

約数の個数: 96

約数和(自身を含む): 49351680

約数和(自身を除く): 30361660

約数列:

[1, 2, 4, 5, 7, 10, 14, 17, 20, 28, 34, 35, 68, 70, 79, 85, 101, 119, 140, 158, 170, 202, 238, 316, 340, 395, 404, 476, 505, 553, 595, 707, 790, 1010, 1106, 1190, 1343, 1414, 1580, 1717, 2020, 2212, 2380, 2686, 2765, 2828, 3434, 3535, 5372, 5530, 6715, 6868, 7070, 7979, 8585, 9401, 11060, 12019, 13430, 14140, 15958, 17170, 18802, 24038, 26860, 31916, 34340, 37604, 39895, 47005, 48076, 55853, 60095, 79790, 94010, 111706, 120190, 135643, 159580, 188020, 223412, 240380, 271286, 279265, 542572, 558530, 678215, 949501, 1117060, 1356430, 1899002, 2712860, 3798004, 4747505, 9495010, 18990020]

約数ペア:

[(1, 18990020), (2, 9495010), (4, 4747505), (5, 3798004), (7, 2712860), (10, 1899002), (14, 1356430), (17, 1117060), (20, 949501), (28, 678215), (34, 558530), (35, 542572), (68, 279265), (70, 271286), (79, 240380), (85, 223412), (101, 188020), (119, 159580), (140, 135643), (158, 120190), (170, 111706), (202, 94010), (238, 79790), (316, 60095), (340, 55853), (395, 48076), (404, 47005), (476, 39895), (505, 37604), (553, 34340), (595, 31916), (707, 26860), (790, 24038), (1010, 18802), (1106, 17170), (1190, 15958), (1343, 14140), (1414, 13430), (1580, 12019), (1717, 11060), (2020, 9401), (2212, 8585), (2380, 7979), (2686, 7070), (2765, 6868), (2828, 6715), (3434, 5530), (3535, 5372)]