21131810

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{199}}^1$

素因数の和:291

約数の個数: 64

約数和(自身を含む): 45964800

約数和(自身を除く): 24832990

約数列:

[1, 2, 5, 7, 10, 14, 35, 37, 41, 70, 74, 82, 185, 199, 205, 259, 287, 370, 398, 410, 518, 574, 995, 1295, 1393, 1435, 1517, 1990, 2590, 2786, 2870, 3034, 6965, 7363, 7585, 8159, 10619, 13930, 14726, 15170, 16318, 21238, 36815, 40795, 51541, 53095, 57113, 73630, 81590, 103082, 106190, 114226, 257705, 285565, 301883, 515410, 571130, 603766, 1509415, 2113181, 3018830, 4226362, 10565905, 21131810]

約数ペア:

[(1, 21131810), (2, 10565905), (5, 4226362), (7, 3018830), (10, 2113181), (14, 1509415), (35, 603766), (37, 571130), (41, 515410), (70, 301883), (74, 285565), (82, 257705), (185, 114226), (199, 106190), (205, 103082), (259, 81590), (287, 73630), (370, 57113), (398, 53095), (410, 51541), (518, 40795), (574, 36815), (995, 21238), (1295, 16318), (1393, 15170), (1435, 14726), (1517, 13930), (1990, 10619), (2590, 8159), (2786, 7585), (2870, 7363), (3034, 6965)]