20149780

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{709}}^1$

素因数の和:761

約数の個数: 72

約数和(自身を含む): 50992200

約数和(自身を除く): 30842420

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 29, 35, 49, 58, 70, 98, 116, 140, 145, 196, 203, 245, 290, 406, 490, 580, 709, 812, 980, 1015, 1418, 1421, 2030, 2836, 2842, 3545, 4060, 4963, 5684, 7090, 7105, 9926, 14180, 14210, 19852, 20561, 24815, 28420, 34741, 41122, 49630, 69482, 82244, 99260, 102805, 138964, 143927, 173705, 205610, 287854, 347410, 411220, 575708, 694820, 719635, 1007489, 1439270, 2014978, 2878540, 4029956, 5037445, 10074890, 20149780]

約数ペア:

[(1, 20149780), (2, 10074890), (4, 5037445), (5, 4029956), (7, 2878540), (10, 2014978), (14, 1439270), (20, 1007489), (28, 719635), (29, 694820), (35, 575708), (49, 411220), (58, 347410), (70, 287854), (98, 205610), (116, 173705), (140, 143927), (145, 138964), (196, 102805), (203, 99260), (245, 82244), (290, 69482), (406, 49630), (490, 41122), (580, 34741), (709, 28420), (812, 24815), (980, 20561), (1015, 19852), (1418, 14210), (1421, 14180), (2030, 9926), (2836, 7105), (2842, 7090), (3545, 5684), (4060, 4963)]