81972280

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{157639}}^1$

素因数の和:157663

約数の個数: 32

約数和(自身を含む): 198626400

約数和(自身を除く): 116654120

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 157639, 315278, 630556, 788195, 1261112, 1576390, 2049307, 3152780, 4098614, 6305560, 8197228, 10246535, 16394456, 20493070, 40986140, 81972280]

約数ペア:

[(1, 81972280), (2, 40986140), (4, 20493070), (5, 16394456), (8, 10246535), (10, 8197228), (13, 6305560), (20, 4098614), (26, 3152780), (40, 2049307), (52, 1576390), (65, 1261112), (104, 788195), (130, 630556), (260, 315278), (520, 157639)]