19988668

素因数分解:

$2^2\times 7^3\times {\mathrm{17}}^1\times {\mathrm{857}}^1$

素因数の和:899

約数の個数: 48

約数和(自身を含む): 43243200

約数和(自身を除く): 23254532

約数列:

[1, 2, 4, 7, 14, 17, 28, 34, 49, 68, 98, 119, 196, 238, 343, 476, 686, 833, 857, 1372, 1666, 1714, 3332, 3428, 5831, 5999, 11662, 11998, 14569, 23324, 23996, 29138, 41993, 58276, 83986, 101983, 167972, 203966, 293951, 407932, 587902, 713881, 1175804, 1427762, 2855524, 4997167, 9994334, 19988668]

約数ペア:

[(1, 19988668), (2, 9994334), (4, 4997167), (7, 2855524), (14, 1427762), (17, 1175804), (28, 713881), (34, 587902), (49, 407932), (68, 293951), (98, 203966), (119, 167972), (196, 101983), (238, 83986), (343, 58276), (476, 41993), (686, 29138), (833, 23996), (857, 23324), (1372, 14569), (1666, 11998), (1714, 11662), (3332, 5999), (3428, 5831)]