21064540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{7919}}^1$

素因数の和:7954

約数の個数: 48

約数和(自身を含む): 53222400

約数和(自身を除く): 32157860

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 70, 76, 95, 133, 140, 190, 266, 380, 532, 665, 1330, 2660, 7919, 15838, 31676, 39595, 55433, 79190, 110866, 150461, 158380, 221732, 277165, 300922, 554330, 601844, 752305, 1053227, 1108660, 1504610, 2106454, 3009220, 4212908, 5266135, 10532270, 21064540]

約数ペア:

[(1, 21064540), (2, 10532270), (4, 5266135), (5, 4212908), (7, 3009220), (10, 2106454), (14, 1504610), (19, 1108660), (20, 1053227), (28, 752305), (35, 601844), (38, 554330), (70, 300922), (76, 277165), (95, 221732), (133, 158380), (140, 150461), (190, 110866), (266, 79190), (380, 55433), (532, 39595), (665, 31676), (1330, 15838), (2660, 7919)]