21146125

素因数分解:

$5^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^3$

素因数の和:72

約数の個数: 64

約数和(自身を含む): 35642880

約数和(自身を除く): 14496755

約数列:

[1, 5, 7, 11, 13, 25, 35, 55, 65, 77, 91, 125, 143, 169, 175, 275, 325, 385, 455, 715, 845, 875, 1001, 1183, 1375, 1625, 1859, 1925, 2197, 2275, 3575, 4225, 5005, 5915, 9295, 9625, 10985, 11375, 13013, 15379, 17875, 21125, 24167, 25025, 29575, 46475, 54925, 65065, 76895, 120835, 125125, 147875, 169169, 232375, 274625, 325325, 384475, 604175, 845845, 1626625, 1922375, 3020875, 4229225, 21146125]

約数ペア:

[(1, 21146125), (5, 4229225), (7, 3020875), (11, 1922375), (13, 1626625), (25, 845845), (35, 604175), (55, 384475), (65, 325325), (77, 274625), (91, 232375), (125, 169169), (143, 147875), (169, 125125), (175, 120835), (275, 76895), (325, 65065), (385, 54925), (455, 46475), (715, 29575), (845, 25025), (875, 24167), (1001, 21125), (1183, 17875), (1375, 15379), (1625, 13013), (1859, 11375), (1925, 10985), (2197, 9625), (2275, 9295), (3575, 5915), (4225, 5005)]