21754775

素因数分解:

$5^2\times 7^3\times {\mathrm{43}}^1\times {\mathrm{59}}^1$

素因数の和:133

約数の個数: 48

約数和(自身を含む): 32736000

約数和(自身を除く): 10981225

約数列:

[1, 5, 7, 25, 35, 43, 49, 59, 175, 215, 245, 295, 301, 343, 413, 1075, 1225, 1475, 1505, 1715, 2065, 2107, 2537, 2891, 7525, 8575, 10325, 10535, 12685, 14455, 14749, 17759, 20237, 52675, 63425, 72275, 73745, 88795, 101185, 124313, 368725, 443975, 505925, 621565, 870191, 3107825, 4350955, 21754775]

約数ペア:

[(1, 21754775), (5, 4350955), (7, 3107825), (25, 870191), (35, 621565), (43, 505925), (49, 443975), (59, 368725), (175, 124313), (215, 101185), (245, 88795), (295, 73745), (301, 72275), (343, 63425), (413, 52675), (1075, 20237), (1225, 17759), (1475, 14749), (1505, 14455), (1715, 12685), (2065, 10535), (2107, 10325), (2537, 8575), (2891, 7525)]