20265875

素因数分解:

$5^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1$

素因数の和:117

約数の個数: 64

約数和(自身を含む): 32348160

約数和(自身を除く): 12082285

約数列:

[1, 5, 7, 19, 23, 25, 35, 53, 95, 115, 125, 133, 161, 175, 265, 371, 437, 475, 575, 665, 805, 875, 1007, 1219, 1325, 1855, 2185, 2375, 2875, 3059, 3325, 4025, 5035, 6095, 6625, 7049, 8533, 9275, 10925, 15295, 16625, 20125, 23161, 25175, 30475, 35245, 42665, 46375, 54625, 76475, 115805, 125875, 152375, 162127, 176225, 213325, 382375, 579025, 810635, 881125, 1066625, 2895125, 4053175, 20265875]

約数ペア:

[(1, 20265875), (5, 4053175), (7, 2895125), (19, 1066625), (23, 881125), (25, 810635), (35, 579025), (53, 382375), (95, 213325), (115, 176225), (125, 162127), (133, 152375), (161, 125875), (175, 115805), (265, 76475), (371, 54625), (437, 46375), (475, 42665), (575, 35245), (665, 30475), (805, 25175), (875, 23161), (1007, 20125), (1219, 16625), (1325, 15295), (1855, 10925), (2185, 9275), (2375, 8533), (2875, 7049), (3059, 6625), (3325, 6095), (4025, 5035)]