18440121

素因数分解:

$3^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{157}}^1$

素因数の和:238

約数の個数: 48

約数和(自身を含む): 31124736

約数和(自身を除く): 12684615

約数列:

[1, 3, 7, 17, 21, 47, 49, 51, 119, 141, 147, 157, 329, 357, 471, 799, 833, 987, 1099, 2303, 2397, 2499, 2669, 3297, 5593, 6909, 7379, 7693, 8007, 16779, 18683, 22137, 23079, 39151, 51653, 56049, 117453, 125443, 130781, 154959, 361571, 376329, 392343, 878101, 1084713, 2634303, 6146707, 18440121]

約数ペア:

[(1, 18440121), (3, 6146707), (7, 2634303), (17, 1084713), (21, 878101), (47, 392343), (49, 376329), (51, 361571), (119, 154959), (141, 130781), (147, 125443), (157, 117453), (329, 56049), (357, 51653), (471, 39151), (799, 23079), (833, 22137), (987, 18683), (1099, 16779), (2303, 8007), (2397, 7693), (2499, 7379), (2669, 6909), (3297, 5593)]