20904940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{271}}^1$

素因数の和:335

約数の個数: 96

約数和(自身を含む): 54835200

約数和(自身を除く): 33930260

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 29, 35, 38, 58, 70, 76, 95, 116, 133, 140, 145, 190, 203, 266, 271, 290, 380, 406, 532, 542, 551, 580, 665, 812, 1015, 1084, 1102, 1330, 1355, 1897, 2030, 2204, 2660, 2710, 2755, 3794, 3857, 4060, 5149, 5420, 5510, 7588, 7714, 7859, 9485, 10298, 11020, 15428, 15718, 18970, 19285, 20596, 25745, 31436, 36043, 37940, 38570, 39295, 51490, 55013, 72086, 77140, 78590, 102980, 110026, 144172, 149321, 157180, 180215, 220052, 275065, 298642, 360430, 550130, 597284, 720860, 746605, 1045247, 1100260, 1493210, 2090494, 2986420, 4180988, 5226235, 10452470, 20904940]

約数ペア:

[(1, 20904940), (2, 10452470), (4, 5226235), (5, 4180988), (7, 2986420), (10, 2090494), (14, 1493210), (19, 1100260), (20, 1045247), (28, 746605), (29, 720860), (35, 597284), (38, 550130), (58, 360430), (70, 298642), (76, 275065), (95, 220052), (116, 180215), (133, 157180), (140, 149321), (145, 144172), (190, 110026), (203, 102980), (266, 78590), (271, 77140), (290, 72086), (380, 55013), (406, 51490), (532, 39295), (542, 38570), (551, 37940), (580, 36043), (665, 31436), (812, 25745), (1015, 20596), (1084, 19285), (1102, 18970), (1330, 15718), (1355, 15428), (1897, 11020), (2030, 10298), (2204, 9485), (2660, 7859), (2710, 7714), (2755, 7588), (3794, 5510), (3857, 5420), (4060, 5149)]