398713520

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{121559}}^1$

素因数の和:121613

約数の個数: 40

約数和(自身を含む): 949626720

約数和(自身を除く): 550913200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 121559, 243118, 486236, 607795, 972472, 1215590, 1944944, 2431180, 4862360, 4983919, 9724720, 9967838, 19935676, 24919595, 39871352, 49839190, 79742704, 99678380, 199356760, 398713520]

約数ペア:

[(1, 398713520), (2, 199356760), (4, 99678380), (5, 79742704), (8, 49839190), (10, 39871352), (16, 24919595), (20, 19935676), (40, 9967838), (41, 9724720), (80, 4983919), (82, 4862360), (164, 2431180), (205, 1944944), (328, 1215590), (410, 972472), (656, 607795), (820, 486236), (1640, 243118), (3280, 121559)]