21325220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{8017}}^1$

素因数の和:8052

約数の個数: 48

約数和(自身を含む): 53880960

約数和(自身を除く): 32555740

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, 8017, 16034, 32068, 40085, 56119, 80170, 112238, 152323, 160340, 224476, 280595, 304646, 561190, 609292, 761615, 1066261, 1122380, 1523230, 2132522, 3046460, 4265044, 5331305, 10662610, 21325220]

約数ペア:

[(1, 21325220), (2, 10662610), (4, 5331305), (5, 4265044), (7, 3046460), (10, 2132522), (14, 1523230), (19, 1122380), (20, 1066261), (28, 761615), (35, 609292), (38, 561190), (70, 304646), (76, 280595), (95, 224476), (133, 160340), (140, 152323), (190, 112238), (266, 80170), (380, 56119), (532, 40085), (665, 32068), (1330, 16034), (2660, 8017)]