20781504

素因数分解:

$2^6\times 3^2\times {\mathrm{109}}^1\times {\mathrm{331}}^1$

素因数の和:458

約数の個数: 84

約数和(自身を含む): 60294520

約数和(自身を除く): 39513016

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 32, 36, 48, 64, 72, 96, 109, 144, 192, 218, 288, 327, 331, 436, 576, 654, 662, 872, 981, 993, 1308, 1324, 1744, 1962, 1986, 2616, 2648, 2979, 3488, 3924, 3972, 5232, 5296, 5958, 6976, 7848, 7944, 10464, 10592, 11916, 15696, 15888, 20928, 21184, 23832, 31392, 31776, 36079, 47664, 62784, 63552, 72158, 95328, 108237, 144316, 190656, 216474, 288632, 324711, 432948, 577264, 649422, 865896, 1154528, 1298844, 1731792, 2309056, 2597688, 3463584, 5195376, 6927168, 10390752, 20781504]

約数ペア:

[(1, 20781504), (2, 10390752), (3, 6927168), (4, 5195376), (6, 3463584), (8, 2597688), (9, 2309056), (12, 1731792), (16, 1298844), (18, 1154528), (24, 865896), (32, 649422), (36, 577264), (48, 432948), (64, 324711), (72, 288632), (96, 216474), (109, 190656), (144, 144316), (192, 108237), (218, 95328), (288, 72158), (327, 63552), (331, 62784), (436, 47664), (576, 36079), (654, 31776), (662, 31392), (872, 23832), (981, 21184), (993, 20928), (1308, 15888), (1324, 15696), (1744, 11916), (1962, 10592), (1986, 10464), (2616, 7944), (2648, 7848), (2979, 6976), (3488, 5958), (3924, 5296), (3972, 5232)]