20889680

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{73}}^2$

素因数の和:173

約数の個数: 90

約数和(自身を含む): 57282606

約数和(自身を除く): 36392926

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 73, 80, 98, 112, 140, 146, 196, 245, 280, 292, 365, 392, 490, 511, 560, 584, 730, 784, 980, 1022, 1168, 1460, 1960, 2044, 2555, 2920, 3577, 3920, 4088, 5110, 5329, 5840, 7154, 8176, 10220, 10658, 14308, 17885, 20440, 21316, 26645, 28616, 35770, 37303, 40880, 42632, 53290, 57232, 71540, 74606, 85264, 106580, 143080, 149212, 186515, 213160, 261121, 286160, 298424, 373030, 426320, 522242, 596848, 746060, 1044484, 1305605, 1492120, 2088968, 2611210, 2984240, 4177936, 5222420, 10444840, 20889680]

約数ペア:

[(1, 20889680), (2, 10444840), (4, 5222420), (5, 4177936), (7, 2984240), (8, 2611210), (10, 2088968), (14, 1492120), (16, 1305605), (20, 1044484), (28, 746060), (35, 596848), (40, 522242), (49, 426320), (56, 373030), (70, 298424), (73, 286160), (80, 261121), (98, 213160), (112, 186515), (140, 149212), (146, 143080), (196, 106580), (245, 85264), (280, 74606), (292, 71540), (365, 57232), (392, 53290), (490, 42632), (511, 40880), (560, 37303), (584, 35770), (730, 28616), (784, 26645), (980, 21316), (1022, 20440), (1168, 17885), (1460, 14308), (1960, 10658), (2044, 10220), (2555, 8176), (2920, 7154), (3577, 5840), (3920, 5329), (4088, 5110)]