21965440

素因数分解:

$2^7\times 5^1\times 7^1\times {\mathrm{4903}}^1$

素因数の和:4929

約数の個数: 64

約数和(自身を含む): 60024960

約数和(自身を除く): 38059520

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 64, 70, 80, 112, 128, 140, 160, 224, 280, 320, 448, 560, 640, 896, 1120, 2240, 4480, 4903, 9806, 19612, 24515, 34321, 39224, 49030, 68642, 78448, 98060, 137284, 156896, 171605, 196120, 274568, 313792, 343210, 392240, 549136, 627584, 686420, 784480, 1098272, 1372840, 1568960, 2196544, 2745680, 3137920, 4393088, 5491360, 10982720, 21965440]

約数ペア:

[(1, 21965440), (2, 10982720), (4, 5491360), (5, 4393088), (7, 3137920), (8, 2745680), (10, 2196544), (14, 1568960), (16, 1372840), (20, 1098272), (28, 784480), (32, 686420), (35, 627584), (40, 549136), (56, 392240), (64, 343210), (70, 313792), (80, 274568), (112, 196120), (128, 171605), (140, 156896), (160, 137284), (224, 98060), (280, 78448), (320, 68642), (448, 49030), (560, 39224), (640, 34321), (896, 24515), (1120, 19612), (2240, 9806), (4480, 4903)]