28078900

素因数分解:

$2^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{83}}^1\times {\mathrm{199}}^1$

素因数の和:313

約数の個数: 72

約数和(自身を含む): 65620800

約数和(自身を除く): 37541900

約数列:

[1, 2, 4, 5, 10, 17, 20, 25, 34, 50, 68, 83, 85, 100, 166, 170, 199, 332, 340, 398, 415, 425, 796, 830, 850, 995, 1411, 1660, 1700, 1990, 2075, 2822, 3383, 3980, 4150, 4975, 5644, 6766, 7055, 8300, 9950, 13532, 14110, 16517, 16915, 19900, 28220, 33034, 33830, 35275, 66068, 67660, 70550, 82585, 84575, 141100, 165170, 169150, 280789, 330340, 338300, 412925, 561578, 825850, 1123156, 1403945, 1651700, 2807890, 5615780, 7019725, 14039450, 28078900]

約数ペア:

[(1, 28078900), (2, 14039450), (4, 7019725), (5, 5615780), (10, 2807890), (17, 1651700), (20, 1403945), (25, 1123156), (34, 825850), (50, 561578), (68, 412925), (83, 338300), (85, 330340), (100, 280789), (166, 169150), (170, 165170), (199, 141100), (332, 84575), (340, 82585), (398, 70550), (415, 67660), (425, 66068), (796, 35275), (830, 33830), (850, 33034), (995, 28220), (1411, 19900), (1660, 16915), (1700, 16517), (1990, 14110), (2075, 13532), (2822, 9950), (3383, 8300), (3980, 7055), (4150, 6766), (4975, 5644)]