19975020

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{25609}}^1$

素因数の和:25634

約数の個数: 48

約数和(自身を含む): 60234720

約数和(自身を除く): 40259700

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 25609, 51218, 76827, 102436, 128045, 153654, 256090, 307308, 332917, 384135, 512180, 665834, 768270, 998751, 1331668, 1536540, 1664585, 1997502, 3329170, 3995004, 4993755, 6658340, 9987510, 19975020]

約数ペア:

[(1, 19975020), (2, 9987510), (3, 6658340), (4, 4993755), (5, 3995004), (6, 3329170), (10, 1997502), (12, 1664585), (13, 1536540), (15, 1331668), (20, 998751), (26, 768270), (30, 665834), (39, 512180), (52, 384135), (60, 332917), (65, 307308), (78, 256090), (130, 153654), (156, 128045), (195, 102436), (260, 76827), (390, 51218), (780, 25609)]