18335980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{647}}^1$

素因数の和:778

約数の個数: 48

約数和(自身を含む): 41912640

約数和(自身を除く): 23576660

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 109, 130, 218, 260, 436, 545, 647, 1090, 1294, 1417, 2180, 2588, 2834, 3235, 5668, 6470, 7085, 8411, 12940, 14170, 16822, 28340, 33644, 42055, 70523, 84110, 141046, 168220, 282092, 352615, 705230, 916799, 1410460, 1833598, 3667196, 4583995, 9167990, 18335980]

約数ペア:

[(1, 18335980), (2, 9167990), (4, 4583995), (5, 3667196), (10, 1833598), (13, 1410460), (20, 916799), (26, 705230), (52, 352615), (65, 282092), (109, 168220), (130, 141046), (218, 84110), (260, 70523), (436, 42055), (545, 33644), (647, 28340), (1090, 16822), (1294, 14170), (1417, 12940), (2180, 8411), (2588, 7085), (2834, 6470), (3235, 5668)]