20947940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{113}}^1$

素因数の和:189

約数の個数: 96

約数和(自身を含む): 51480576

約数和(自身を除く): 30532636

約数列:

[1, 2, 4, 5, 10, 13, 20, 23, 26, 31, 46, 52, 62, 65, 92, 113, 115, 124, 130, 155, 226, 230, 260, 299, 310, 403, 452, 460, 565, 598, 620, 713, 806, 1130, 1196, 1426, 1469, 1495, 1612, 2015, 2260, 2599, 2852, 2938, 2990, 3503, 3565, 4030, 5198, 5876, 5980, 7006, 7130, 7345, 8060, 9269, 10396, 12995, 14012, 14260, 14690, 17515, 18538, 25990, 29380, 33787, 35030, 37076, 45539, 46345, 51980, 67574, 70060, 80569, 91078, 92690, 135148, 161138, 168935, 182156, 185380, 227695, 322276, 337870, 402845, 455390, 675740, 805690, 910780, 1047397, 1611380, 2094794, 4189588, 5236985, 10473970, 20947940]

約数ペア:

[(1, 20947940), (2, 10473970), (4, 5236985), (5, 4189588), (10, 2094794), (13, 1611380), (20, 1047397), (23, 910780), (26, 805690), (31, 675740), (46, 455390), (52, 402845), (62, 337870), (65, 322276), (92, 227695), (113, 185380), (115, 182156), (124, 168935), (130, 161138), (155, 135148), (226, 92690), (230, 91078), (260, 80569), (299, 70060), (310, 67574), (403, 51980), (452, 46345), (460, 45539), (565, 37076), (598, 35030), (620, 33787), (713, 29380), (806, 25990), (1130, 18538), (1196, 17515), (1426, 14690), (1469, 14260), (1495, 14012), (1612, 12995), (2015, 10396), (2260, 9269), (2599, 8060), (2852, 7345), (2938, 7130), (2990, 7006), (3503, 5980), (3565, 5876), (4030, 5198)]