18900900

素因数分解:

$2^2\times 3^2\times 5^2\times {\mathrm{21001}}^1$

素因数の和:21021

約数の個数: 54

約数和(自身を含む): 59246642

約数和(自身を除く): 40345742

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 25, 30, 36, 45, 50, 60, 75, 90, 100, 150, 180, 225, 300, 450, 900, 21001, 42002, 63003, 84004, 105005, 126006, 189009, 210010, 252012, 315015, 378018, 420020, 525025, 630030, 756036, 945045, 1050050, 1260060, 1575075, 1890090, 2100100, 3150150, 3780180, 4725225, 6300300, 9450450, 18900900]

約数ペア:

[(1, 18900900), (2, 9450450), (3, 6300300), (4, 4725225), (5, 3780180), (6, 3150150), (9, 2100100), (10, 1890090), (12, 1575075), (15, 1260060), (18, 1050050), (20, 945045), (25, 756036), (30, 630030), (36, 525025), (45, 420020), (50, 378018), (60, 315015), (75, 252012), (90, 210010), (100, 189009), (150, 126006), (180, 105005), (225, 84004), (300, 63003), (450, 42002), (900, 21001)]