20859475

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{173}}^1$

素因数の和:256

約数の個数: 48

約数和(自身を含む): 32622912

約数和(自身を除く): 11763437

約数列:

[1, 5, 7, 13, 25, 35, 53, 65, 91, 173, 175, 265, 325, 371, 455, 689, 865, 1211, 1325, 1855, 2249, 2275, 3445, 4325, 4823, 6055, 9169, 9275, 11245, 15743, 17225, 24115, 30275, 45845, 56225, 64183, 78715, 119197, 120575, 229225, 320915, 393575, 595985, 834379, 1604575, 2979925, 4171895, 20859475]

約数ペア:

[(1, 20859475), (5, 4171895), (7, 2979925), (13, 1604575), (25, 834379), (35, 595985), (53, 393575), (65, 320915), (91, 229225), (173, 120575), (175, 119197), (265, 78715), (325, 64183), (371, 56225), (455, 45845), (689, 30275), (865, 24115), (1211, 17225), (1325, 15743), (1855, 11245), (2249, 9275), (2275, 9169), (3445, 6055), (4325, 4823)]