219701420

素因数分解:

$2^2\times 5^1\times {\mathrm{137}}^1\times {\mathrm{181}}^1\times {\mathrm{443}}^1$

素因数の和:770

約数の個数: 48

約数和(自身を含む): 468363168

約数和(自身を除く): 248661748

約数列:

[1, 2, 4, 5, 10, 20, 137, 181, 274, 362, 443, 548, 685, 724, 886, 905, 1370, 1772, 1810, 2215, 2740, 3620, 4430, 8860, 24797, 49594, 60691, 80183, 99188, 121382, 123985, 160366, 242764, 247970, 303455, 320732, 400915, 495940, 606910, 801830, 1213820, 1603660, 10985071, 21970142, 43940284, 54925355, 109850710, 219701420]

約数ペア:

[(1, 219701420), (2, 109850710), (4, 54925355), (5, 43940284), (10, 21970142), (20, 10985071), (137, 1603660), (181, 1213820), (274, 801830), (362, 606910), (443, 495940), (548, 400915), (685, 320732), (724, 303455), (886, 247970), (905, 242764), (1370, 160366), (1772, 123985), (1810, 121382), (2215, 99188), (2740, 80183), (3620, 60691), (4430, 49594), (8860, 24797)]