21343175

素因数分解:

$5^2\times 7^3\times {\mathrm{19}}^1\times {\mathrm{131}}^1$

素因数の和:181

約数の個数: 48

約数和(自身を含む): 32736000

約数和(自身を除く): 11392825

約数列:

[1, 5, 7, 19, 25, 35, 49, 95, 131, 133, 175, 245, 343, 475, 655, 665, 917, 931, 1225, 1715, 2489, 3275, 3325, 4585, 4655, 6419, 6517, 8575, 12445, 17423, 22925, 23275, 32095, 32585, 44933, 62225, 87115, 121961, 160475, 162925, 224665, 435575, 609805, 853727, 1123325, 3049025, 4268635, 21343175]

約数ペア:

[(1, 21343175), (5, 4268635), (7, 3049025), (19, 1123325), (25, 853727), (35, 609805), (49, 435575), (95, 224665), (131, 162925), (133, 160475), (175, 121961), (245, 87115), (343, 62225), (475, 44933), (655, 32585), (665, 32095), (917, 23275), (931, 22925), (1225, 17423), (1715, 12445), (2489, 8575), (3275, 6517), (3325, 6419), (4585, 4655)]