20402720

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{577}}^1$

素因数の和:622

約数の個数: 96

約数和(自身を含む): 55057968

約数和(自身を除く): 34655248

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 17, 20, 26, 32, 34, 40, 52, 65, 68, 80, 85, 104, 130, 136, 160, 170, 208, 221, 260, 272, 340, 416, 442, 520, 544, 577, 680, 884, 1040, 1105, 1154, 1360, 1768, 2080, 2210, 2308, 2720, 2885, 3536, 4420, 4616, 5770, 7072, 7501, 8840, 9232, 9809, 11540, 15002, 17680, 18464, 19618, 23080, 30004, 35360, 37505, 39236, 46160, 49045, 60008, 75010, 78472, 92320, 98090, 120016, 127517, 150020, 156944, 196180, 240032, 255034, 300040, 313888, 392360, 510068, 600080, 637585, 784720, 1020136, 1200160, 1275170, 1569440, 2040272, 2550340, 4080544, 5100680, 10201360, 20402720]

約数ペア:

[(1, 20402720), (2, 10201360), (4, 5100680), (5, 4080544), (8, 2550340), (10, 2040272), (13, 1569440), (16, 1275170), (17, 1200160), (20, 1020136), (26, 784720), (32, 637585), (34, 600080), (40, 510068), (52, 392360), (65, 313888), (68, 300040), (80, 255034), (85, 240032), (104, 196180), (130, 156944), (136, 150020), (160, 127517), (170, 120016), (208, 98090), (221, 92320), (260, 78472), (272, 75010), (340, 60008), (416, 49045), (442, 46160), (520, 39236), (544, 37505), (577, 35360), (680, 30004), (884, 23080), (1040, 19618), (1105, 18464), (1154, 17680), (1360, 15002), (1768, 11540), (2080, 9809), (2210, 9232), (2308, 8840), (2720, 7501), (2885, 7072), (3536, 5770), (4420, 4616)]