18725980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{10289}}^1$

素因数の和:10318

約数の個数: 48

約数和(自身を含む): 48404160

約数和(自身を除く): 29678180

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 1820, 10289, 20578, 41156, 51445, 72023, 102890, 133757, 144046, 205780, 267514, 288092, 360115, 535028, 668785, 720230, 936299, 1337570, 1440460, 1872598, 2675140, 3745196, 4681495, 9362990, 18725980]

約数ペア:

[(1, 18725980), (2, 9362990), (4, 4681495), (5, 3745196), (7, 2675140), (10, 1872598), (13, 1440460), (14, 1337570), (20, 936299), (26, 720230), (28, 668785), (35, 535028), (52, 360115), (65, 288092), (70, 267514), (91, 205780), (130, 144046), (140, 133757), (182, 102890), (260, 72023), (364, 51445), (455, 41156), (910, 20578), (1820, 10289)]