19968880

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{14683}}^1$

素因数の和:14713

約数の個数: 40

約数和(自身を含む): 49162032

約数和(自身を除く): 29193152

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 14683, 29366, 58732, 73415, 117464, 146830, 234928, 249611, 293660, 499222, 587320, 998444, 1174640, 1248055, 1996888, 2496110, 3993776, 4992220, 9984440, 19968880]

約数ペア:

[(1, 19968880), (2, 9984440), (4, 4992220), (5, 3993776), (8, 2496110), (10, 1996888), (16, 1248055), (17, 1174640), (20, 998444), (34, 587320), (40, 499222), (68, 293660), (80, 249611), (85, 234928), (136, 146830), (170, 117464), (272, 73415), (340, 58732), (680, 29366), (1360, 14683)]