218380

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{179}}^1$

素因数の和:249

約数の個数: 24

約数和(自身を含む): 468720

約数和(自身を除く): 250340

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 179, 244, 305, 358, 610, 716, 895, 1220, 1790, 3580, 10919, 21838, 43676, 54595, 109190, 218380]

約数ペア:

[(1, 218380), (2, 109190), (4, 54595), (5, 43676), (10, 21838), (20, 10919), (61, 3580), (122, 1790), (179, 1220), (244, 895), (305, 716), (358, 610)]