19950980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{4597}}^1$

素因数の和:4644

約数の個数: 48

約数和(自身を含む): 49437696

約数和(自身を除く): 29486716

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, 4597, 9194, 18388, 22985, 32179, 45970, 64358, 91940, 128716, 142507, 160895, 285014, 321790, 570028, 643580, 712535, 997549, 1425070, 1995098, 2850140, 3990196, 4987745, 9975490, 19950980]

約数ペア:

[(1, 19950980), (2, 9975490), (4, 4987745), (5, 3990196), (7, 2850140), (10, 1995098), (14, 1425070), (20, 997549), (28, 712535), (31, 643580), (35, 570028), (62, 321790), (70, 285014), (124, 160895), (140, 142507), (155, 128716), (217, 91940), (310, 64358), (434, 45970), (620, 32179), (868, 22985), (1085, 18388), (2170, 9194), (4340, 4597)]