19854725

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{137}}^1$

素因数の和:206

約数の個数: 48

約数和(自身を含む): 29569536

約数和(自身を除く): 9714811

約数列:

[1, 5, 11, 17, 25, 31, 55, 85, 137, 155, 187, 275, 341, 425, 527, 685, 775, 935, 1507, 1705, 2329, 2635, 3425, 4247, 4675, 5797, 7535, 8525, 11645, 13175, 21235, 25619, 28985, 37675, 46717, 58225, 72199, 106175, 128095, 144925, 233585, 360995, 640475, 794189, 1167925, 1804975, 3970945, 19854725]

約数ペア:

[(1, 19854725), (5, 3970945), (11, 1804975), (17, 1167925), (25, 794189), (31, 640475), (55, 360995), (85, 233585), (137, 144925), (155, 128095), (187, 106175), (275, 72199), (341, 58225), (425, 46717), (527, 37675), (685, 28985), (775, 25619), (935, 21235), (1507, 13175), (1705, 11645), (2329, 8525), (2635, 7535), (3425, 5797), (4247, 4675)]