209218975

素因数分解:

$5^2\times 7^2\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{101}}^1$

素因数の和:233

約数の個数: 72

約数和(自身を含む): 324421200

約数和(自身を除く): 115202225

約数列:

[1, 5, 7, 19, 25, 35, 49, 89, 95, 101, 133, 175, 245, 445, 475, 505, 623, 665, 707, 931, 1225, 1691, 1919, 2225, 2525, 3115, 3325, 3535, 4361, 4655, 4949, 8455, 8989, 9595, 11837, 13433, 15575, 17675, 21805, 23275, 24745, 42275, 44945, 47975, 59185, 62923, 67165, 82859, 94031, 109025, 123725, 170791, 224725, 295925, 314615, 335825, 414295, 440461, 470155, 853955, 1195537, 1573075, 2071475, 2202305, 2350775, 4269775, 5977685, 8368759, 11011525, 29888425, 41843795, 209218975]

約数ペア:

[(1, 209218975), (5, 41843795), (7, 29888425), (19, 11011525), (25, 8368759), (35, 5977685), (49, 4269775), (89, 2350775), (95, 2202305), (101, 2071475), (133, 1573075), (175, 1195537), (245, 853955), (445, 470155), (475, 440461), (505, 414295), (623, 335825), (665, 314615), (707, 295925), (931, 224725), (1225, 170791), (1691, 123725), (1919, 109025), (2225, 94031), (2525, 82859), (3115, 67165), (3325, 62923), (3535, 59185), (4361, 47975), (4655, 44945), (4949, 42275), (8455, 24745), (8989, 23275), (9595, 21805), (11837, 17675), (13433, 15575)]