20219375

素因数分解:

$5^4\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{173}}^1$

素因数の和:221

約数の個数: 40

約数和(自身を含む): 29353104

約数和(自身を除く): 9133729

約数列:

[1, 5, 11, 17, 25, 55, 85, 125, 173, 187, 275, 425, 625, 865, 935, 1375, 1903, 2125, 2941, 4325, 4675, 6875, 9515, 10625, 14705, 21625, 23375, 32351, 47575, 73525, 108125, 116875, 161755, 237875, 367625, 808775, 1189375, 1838125, 4043875, 20219375]

約数ペア:

[(1, 20219375), (5, 4043875), (11, 1838125), (17, 1189375), (25, 808775), (55, 367625), (85, 237875), (125, 161755), (173, 116875), (187, 108125), (275, 73525), (425, 47575), (625, 32351), (865, 23375), (935, 21625), (1375, 14705), (1903, 10625), (2125, 9515), (2941, 6875), (4325, 4675)]