20996480

素因数分解:

$2^7\times 5^1\times {\mathrm{53}}^1\times {\mathrm{619}}^1$

素因数の和:691

約数の個数: 64

約数和(自身を含む): 51224400

約数和(自身を除く): 30227920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 53, 64, 80, 106, 128, 160, 212, 265, 320, 424, 530, 619, 640, 848, 1060, 1238, 1696, 2120, 2476, 3095, 3392, 4240, 4952, 6190, 6784, 8480, 9904, 12380, 16960, 19808, 24760, 32807, 33920, 39616, 49520, 65614, 79232, 99040, 131228, 164035, 198080, 262456, 328070, 396160, 524912, 656140, 1049824, 1312280, 2099648, 2624560, 4199296, 5249120, 10498240, 20996480]

約数ペア:

[(1, 20996480), (2, 10498240), (4, 5249120), (5, 4199296), (8, 2624560), (10, 2099648), (16, 1312280), (20, 1049824), (32, 656140), (40, 524912), (53, 396160), (64, 328070), (80, 262456), (106, 198080), (128, 164035), (160, 131228), (212, 99040), (265, 79232), (320, 65614), (424, 49520), (530, 39616), (619, 33920), (640, 32807), (848, 24760), (1060, 19808), (1238, 16960), (1696, 12380), (2120, 9904), (2476, 8480), (3095, 6784), (3392, 6190), (4240, 4952)]