20403540

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{263}}^1\times {\mathrm{431}}^1$

素因数の和:709

約数の個数: 72

約数和(自身を含む): 62270208

約数和(自身を除く): 41866668

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 263, 431, 526, 789, 862, 1052, 1293, 1315, 1578, 1724, 2155, 2367, 2586, 2630, 3156, 3879, 3945, 4310, 4734, 5172, 5260, 6465, 7758, 7890, 8620, 9468, 11835, 12930, 15516, 15780, 19395, 23670, 25860, 38790, 47340, 77580, 113353, 226706, 340059, 453412, 566765, 680118, 1020177, 1133530, 1360236, 1700295, 2040354, 2267060, 3400590, 4080708, 5100885, 6801180, 10201770, 20403540]

約数ペア:

[(1, 20403540), (2, 10201770), (3, 6801180), (4, 5100885), (5, 4080708), (6, 3400590), (9, 2267060), (10, 2040354), (12, 1700295), (15, 1360236), (18, 1133530), (20, 1020177), (30, 680118), (36, 566765), (45, 453412), (60, 340059), (90, 226706), (180, 113353), (263, 77580), (431, 47340), (526, 38790), (789, 25860), (862, 23670), (1052, 19395), (1293, 15780), (1315, 15516), (1578, 12930), (1724, 11835), (2155, 9468), (2367, 8620), (2586, 7890), (2630, 7758), (3156, 6465), (3879, 5260), (3945, 5172), (4310, 4734)]