20519820

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{3931}}^1$

素因数の和:3975

約数の個数: 72

約数和(自身を含む): 64406160

約数和(自身を除く): 43886340

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 29, 30, 36, 45, 58, 60, 87, 90, 116, 145, 174, 180, 261, 290, 348, 435, 522, 580, 870, 1044, 1305, 1740, 2610, 3931, 5220, 7862, 11793, 15724, 19655, 23586, 35379, 39310, 47172, 58965, 70758, 78620, 113999, 117930, 141516, 176895, 227998, 235860, 341997, 353790, 455996, 569995, 683994, 707580, 1025991, 1139990, 1367988, 1709985, 2051982, 2279980, 3419970, 4103964, 5129955, 6839940, 10259910, 20519820]

約数ペア:

[(1, 20519820), (2, 10259910), (3, 6839940), (4, 5129955), (5, 4103964), (6, 3419970), (9, 2279980), (10, 2051982), (12, 1709985), (15, 1367988), (18, 1139990), (20, 1025991), (29, 707580), (30, 683994), (36, 569995), (45, 455996), (58, 353790), (60, 341997), (87, 235860), (90, 227998), (116, 176895), (145, 141516), (174, 117930), (180, 113999), (261, 78620), (290, 70758), (348, 58965), (435, 47172), (522, 39310), (580, 35379), (870, 23586), (1044, 19655), (1305, 15724), (1740, 11793), (2610, 7862), (3931, 5220)]