19977020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{4603}}^1$

素因数の和:4650

約数の個数: 48

約数和(自身を含む): 49502208

約数和(自身を除く): 29525188

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 62, 70, 124, 140, 155, 217, 310, 434, 620, 868, 1085, 2170, 4340, 4603, 9206, 18412, 23015, 32221, 46030, 64442, 92060, 128884, 142693, 161105, 285386, 322210, 570772, 644420, 713465, 998851, 1426930, 1997702, 2853860, 3995404, 4994255, 9988510, 19977020]

約数ペア:

[(1, 19977020), (2, 9988510), (4, 4994255), (5, 3995404), (7, 2853860), (10, 1997702), (14, 1426930), (20, 998851), (28, 713465), (31, 644420), (35, 570772), (62, 322210), (70, 285386), (124, 161105), (140, 142693), (155, 128884), (217, 92060), (310, 64442), (434, 46030), (620, 32221), (868, 23015), (1085, 18412), (2170, 9206), (4340, 4603)]