21143750

素因数分解:

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

素因数の和:243

約数の個数: 48

約数和(自身を含む): 42184800

約数和(自身を除く): 21041050

約数列:

[1, 2, 5, 10, 17, 25, 34, 50, 85, 125, 170, 199, 250, 398, 425, 625, 850, 995, 1250, 1990, 2125, 3125, 3383, 4250, 4975, 6250, 6766, 9950, 10625, 16915, 21250, 24875, 33830, 49750, 53125, 84575, 106250, 124375, 169150, 248750, 422875, 621875, 845750, 1243750, 2114375, 4228750, 10571875, 21143750]

約数ペア:

[(1, 21143750), (2, 10571875), (5, 4228750), (10, 2114375), (17, 1243750), (25, 845750), (34, 621875), (50, 422875), (85, 248750), (125, 169150), (170, 124375), (199, 106250), (250, 84575), (398, 53125), (425, 49750), (625, 33830), (850, 24875), (995, 21250), (1250, 16915), (1990, 10625), (2125, 9950), (3125, 6766), (3383, 6250), (4250, 4975)]