19020820

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{1493}}^1$

素因数の和:1529

約数の個数: 72

約数和(自身を含む): 50072904

約数和(自身を除く): 31052084

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 49, 52, 65, 70, 91, 98, 130, 140, 182, 196, 245, 260, 364, 455, 490, 637, 910, 980, 1274, 1493, 1820, 2548, 2986, 3185, 5972, 6370, 7465, 10451, 12740, 14930, 19409, 20902, 29860, 38818, 41804, 52255, 73157, 77636, 97045, 104510, 135863, 146314, 194090, 209020, 271726, 292628, 365785, 388180, 543452, 679315, 731570, 951041, 1358630, 1463140, 1902082, 2717260, 3804164, 4755205, 9510410, 19020820]

約数ペア:

[(1, 19020820), (2, 9510410), (4, 4755205), (5, 3804164), (7, 2717260), (10, 1902082), (13, 1463140), (14, 1358630), (20, 951041), (26, 731570), (28, 679315), (35, 543452), (49, 388180), (52, 365785), (65, 292628), (70, 271726), (91, 209020), (98, 194090), (130, 146314), (140, 135863), (182, 104510), (196, 97045), (245, 77636), (260, 73157), (364, 52255), (455, 41804), (490, 38818), (637, 29860), (910, 20902), (980, 19409), (1274, 14930), (1493, 12740), (1820, 10451), (2548, 7465), (2986, 6370), (3185, 5972)]