21215350

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{257}}^1$

素因数の和:409

約数の個数: 48

約数和(自身を含む): 42997248

約数和(自身を除く): 21781898

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 127, 130, 254, 257, 325, 514, 635, 650, 1270, 1285, 1651, 2570, 3175, 3302, 3341, 6350, 6425, 6682, 8255, 12850, 16510, 16705, 32639, 33410, 41275, 65278, 82550, 83525, 163195, 167050, 326390, 424307, 815975, 848614, 1631950, 2121535, 4243070, 10607675, 21215350]

約数ペア:

[(1, 21215350), (2, 10607675), (5, 4243070), (10, 2121535), (13, 1631950), (25, 848614), (26, 815975), (50, 424307), (65, 326390), (127, 167050), (130, 163195), (254, 83525), (257, 82550), (325, 65278), (514, 41275), (635, 33410), (650, 32639), (1270, 16705), (1285, 16510), (1651, 12850), (2570, 8255), (3175, 6682), (3302, 6425), (3341, 6350)]