20687328

素因数分解:

$2^5\times 3^2\times {\mathrm{109}}^1\times {\mathrm{659}}^1$

素因数の和:784

約数の個数: 72

約数和(自身を含む): 59459400

約数和(自身を除く): 38772072

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 32, 36, 48, 72, 96, 109, 144, 218, 288, 327, 436, 654, 659, 872, 981, 1308, 1318, 1744, 1962, 1977, 2616, 2636, 3488, 3924, 3954, 5232, 5272, 5931, 7848, 7908, 10464, 10544, 11862, 15696, 15816, 21088, 23724, 31392, 31632, 47448, 63264, 71831, 94896, 143662, 189792, 215493, 287324, 430986, 574648, 646479, 861972, 1149296, 1292958, 1723944, 2298592, 2585916, 3447888, 5171832, 6895776, 10343664, 20687328]

約数ペア:

[(1, 20687328), (2, 10343664), (3, 6895776), (4, 5171832), (6, 3447888), (8, 2585916), (9, 2298592), (12, 1723944), (16, 1292958), (18, 1149296), (24, 861972), (32, 646479), (36, 574648), (48, 430986), (72, 287324), (96, 215493), (109, 189792), (144, 143662), (218, 94896), (288, 71831), (327, 63264), (436, 47448), (654, 31632), (659, 31392), (872, 23724), (981, 21088), (1308, 15816), (1318, 15696), (1744, 11862), (1962, 10544), (1977, 10464), (2616, 7908), (2636, 7848), (3488, 5931), (3924, 5272), (3954, 5232)]