21228720

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{197}}^1\times {\mathrm{449}}^1$

素因数の和:662

約数の個数: 80

約数和(自身を含む): 66290400

約数和(自身を除く): 45061680

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 197, 240, 394, 449, 591, 788, 898, 985, 1182, 1347, 1576, 1796, 1970, 2245, 2364, 2694, 2955, 3152, 3592, 3940, 4490, 4728, 5388, 5910, 6735, 7184, 7880, 8980, 9456, 10776, 11820, 13470, 15760, 17960, 21552, 23640, 26940, 35920, 47280, 53880, 88453, 107760, 176906, 265359, 353812, 442265, 530718, 707624, 884530, 1061436, 1326795, 1415248, 1769060, 2122872, 2653590, 3538120, 4245744, 5307180, 7076240, 10614360, 21228720]

約数ペア:

[(1, 21228720), (2, 10614360), (3, 7076240), (4, 5307180), (5, 4245744), (6, 3538120), (8, 2653590), (10, 2122872), (12, 1769060), (15, 1415248), (16, 1326795), (20, 1061436), (24, 884530), (30, 707624), (40, 530718), (48, 442265), (60, 353812), (80, 265359), (120, 176906), (197, 107760), (240, 88453), (394, 53880), (449, 47280), (591, 35920), (788, 26940), (898, 23640), (985, 21552), (1182, 17960), (1347, 15760), (1576, 13470), (1796, 11820), (1970, 10776), (2245, 9456), (2364, 8980), (2694, 7880), (2955, 7184), (3152, 6735), (3592, 5910), (3940, 5388), (4490, 4728)]