21288720

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{107}}^1\times {\mathrm{829}}^1$

素因数の和:952

約数の個数: 80

約数和(自身を含む): 66692160

約数和(自身を除く): 45403440

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 107, 120, 214, 240, 321, 428, 535, 642, 829, 856, 1070, 1284, 1605, 1658, 1712, 2140, 2487, 2568, 3210, 3316, 4145, 4280, 4974, 5136, 6420, 6632, 8290, 8560, 9948, 12435, 12840, 13264, 16580, 19896, 24870, 25680, 33160, 39792, 49740, 66320, 88703, 99480, 177406, 198960, 266109, 354812, 443515, 532218, 709624, 887030, 1064436, 1330545, 1419248, 1774060, 2128872, 2661090, 3548120, 4257744, 5322180, 7096240, 10644360, 21288720]

約数ペア:

[(1, 21288720), (2, 10644360), (3, 7096240), (4, 5322180), (5, 4257744), (6, 3548120), (8, 2661090), (10, 2128872), (12, 1774060), (15, 1419248), (16, 1330545), (20, 1064436), (24, 887030), (30, 709624), (40, 532218), (48, 443515), (60, 354812), (80, 266109), (107, 198960), (120, 177406), (214, 99480), (240, 88703), (321, 66320), (428, 49740), (535, 39792), (642, 33160), (829, 25680), (856, 24870), (1070, 19896), (1284, 16580), (1605, 13264), (1658, 12840), (1712, 12435), (2140, 9948), (2487, 8560), (2568, 8290), (3210, 6632), (3316, 6420), (4145, 5136), (4280, 4974)]