18181840

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{461}}^1$

素因数の和:520

約数の個数: 80

約数和(自身を含む): 46403280

約数和(自身を除く): 28221440

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 29, 34, 40, 58, 68, 80, 85, 116, 136, 145, 170, 232, 272, 290, 340, 461, 464, 493, 580, 680, 922, 986, 1160, 1360, 1844, 1972, 2305, 2320, 2465, 3688, 3944, 4610, 4930, 7376, 7837, 7888, 9220, 9860, 13369, 15674, 18440, 19720, 26738, 31348, 36880, 39185, 39440, 53476, 62696, 66845, 78370, 106952, 125392, 133690, 156740, 213904, 227273, 267380, 313480, 454546, 534760, 626960, 909092, 1069520, 1136365, 1818184, 2272730, 3636368, 4545460, 9090920, 18181840]

約数ペア:

[(1, 18181840), (2, 9090920), (4, 4545460), (5, 3636368), (8, 2272730), (10, 1818184), (16, 1136365), (17, 1069520), (20, 909092), (29, 626960), (34, 534760), (40, 454546), (58, 313480), (68, 267380), (80, 227273), (85, 213904), (116, 156740), (136, 133690), (145, 125392), (170, 106952), (232, 78370), (272, 66845), (290, 62696), (340, 53476), (461, 39440), (464, 39185), (493, 36880), (580, 31348), (680, 26738), (922, 19720), (986, 18440), (1160, 15674), (1360, 13369), (1844, 9860), (1972, 9220), (2305, 7888), (2320, 7837), (2465, 7376), (3688, 4930), (3944, 4610)]