28161380

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{1217}}^1$

素因数の和:1328

約数の個数: 48

約数和(自身を含む): 64456560

約数和(自身を除く): 36295180

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 89, 130, 178, 260, 356, 445, 890, 1157, 1217, 1780, 2314, 2434, 4628, 4868, 5785, 6085, 11570, 12170, 15821, 23140, 24340, 31642, 63284, 79105, 108313, 158210, 216626, 316420, 433252, 541565, 1083130, 1408069, 2166260, 2816138, 5632276, 7040345, 14080690, 28161380]

約数ペア:

[(1, 28161380), (2, 14080690), (4, 7040345), (5, 5632276), (10, 2816138), (13, 2166260), (20, 1408069), (26, 1083130), (52, 541565), (65, 433252), (89, 316420), (130, 216626), (178, 158210), (260, 108313), (356, 79105), (445, 63284), (890, 31642), (1157, 24340), (1217, 23140), (1780, 15821), (2314, 12170), (2434, 11570), (4628, 6085), (4868, 5785)]