20364575

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{149}}^1$

素因数の和:248

約数の個数: 48

約数和(自身を含む): 32140800

約数和(自身を除く): 11776225

約数列:

[1, 5, 7, 11, 25, 35, 55, 71, 77, 149, 175, 275, 355, 385, 497, 745, 781, 1043, 1639, 1775, 1925, 2485, 3725, 3905, 5215, 5467, 8195, 10579, 11473, 12425, 19525, 26075, 27335, 40975, 52895, 57365, 74053, 116369, 136675, 264475, 286825, 370265, 581845, 814583, 1851325, 2909225, 4072915, 20364575]

約数ペア:

[(1, 20364575), (5, 4072915), (7, 2909225), (11, 1851325), (25, 814583), (35, 581845), (55, 370265), (71, 286825), (77, 264475), (149, 136675), (175, 116369), (275, 74053), (355, 57365), (385, 52895), (497, 40975), (745, 27335), (781, 26075), (1043, 19525), (1639, 12425), (1775, 11473), (1925, 10579), (2485, 8195), (3725, 5467), (3905, 5215)]