409881040

素因数分解:

$2^4\times 5^1\times {\mathrm{641}}^1\times {\mathrm{7993}}^1$

素因数の和:8647

約数の個数: 40

約数和(自身を含む): 954579528

約数和(自身を除く): 544698488

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 641, 1282, 2564, 3205, 5128, 6410, 7993, 10256, 12820, 15986, 25640, 31972, 39965, 51280, 63944, 79930, 127888, 159860, 319720, 639440, 5123513, 10247026, 20494052, 25617565, 40988104, 51235130, 81976208, 102470260, 204940520, 409881040]

約数ペア:

[(1, 409881040), (2, 204940520), (4, 102470260), (5, 81976208), (8, 51235130), (10, 40988104), (16, 25617565), (20, 20494052), (40, 10247026), (80, 5123513), (641, 639440), (1282, 319720), (2564, 159860), (3205, 127888), (5128, 79930), (6410, 63944), (7993, 51280), (10256, 39965), (12820, 31972), (15986, 25640)]