20453125

素因数分解:

$5^6\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1$

素因数の和:65

約数の個数: 56

約数和(自身を含む): 33749568

約数和(自身を除く): 13296443

約数列:

[1, 5, 7, 11, 17, 25, 35, 55, 77, 85, 119, 125, 175, 187, 275, 385, 425, 595, 625, 875, 935, 1309, 1375, 1925, 2125, 2975, 3125, 4375, 4675, 6545, 6875, 9625, 10625, 14875, 15625, 21875, 23375, 32725, 34375, 48125, 53125, 74375, 109375, 116875, 163625, 171875, 240625, 265625, 371875, 584375, 818125, 1203125, 1859375, 2921875, 4090625, 20453125]

約数ペア:

[(1, 20453125), (5, 4090625), (7, 2921875), (11, 1859375), (17, 1203125), (25, 818125), (35, 584375), (55, 371875), (77, 265625), (85, 240625), (119, 171875), (125, 163625), (175, 116875), (187, 109375), (275, 74375), (385, 53125), (425, 48125), (595, 34375), (625, 32725), (875, 23375), (935, 21875), (1309, 15625), (1375, 14875), (1925, 10625), (2125, 9625), (2975, 6875), (3125, 6545), (4375, 4675)]