72980

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{89}}^1$

素因数の和:139

約数の個数: 24

約数和(自身を含む): 158760

約数和(自身を除く): 85780

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 89, 164, 178, 205, 356, 410, 445, 820, 890, 1780, 3649, 7298, 14596, 18245, 36490, 72980]

約数ペア:

[(1, 72980), (2, 36490), (4, 18245), (5, 14596), (10, 7298), (20, 3649), (41, 1780), (82, 890), (89, 820), (164, 445), (178, 410), (205, 356)]