320440940

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{180023}}^1$

素因数の和:180121

約数の個数: 24

約数和(自身を含む): 680490720

約数和(自身を除く): 360049780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 180023, 360046, 720092, 900115, 1800230, 3600460, 16022047, 32044094, 64088188, 80110235, 160220470, 320440940]

約数ペア:

[(1, 320440940), (2, 160220470), (4, 80110235), (5, 64088188), (10, 32044094), (20, 16022047), (89, 3600460), (178, 1800230), (356, 900115), (445, 720092), (890, 360046), (1780, 180023)]