28705160

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{65239}}^1$

素因数の和:65261

約数の個数: 32

約数和(自身を含む): 70459200

約数和(自身を除く): 41754040

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 65239, 130478, 260956, 326195, 521912, 652390, 717629, 1304780, 1435258, 2609560, 2870516, 3588145, 5741032, 7176290, 14352580, 28705160]

約数ペア:

[(1, 28705160), (2, 14352580), (4, 7176290), (5, 5741032), (8, 3588145), (10, 2870516), (11, 2609560), (20, 1435258), (22, 1304780), (40, 717629), (44, 652390), (55, 521912), (88, 326195), (110, 260956), (220, 130478), (440, 65239)]