27978680

素因数分解:

$2^3\times 5^1\times {\mathrm{97}}^1\times {\mathrm{7211}}^1$

素因数の和:7319

約数の個数: 32

約数和(自身を含む): 63609840

約数和(自身を除く): 35631160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 97, 194, 388, 485, 776, 970, 1940, 3880, 7211, 14422, 28844, 36055, 57688, 72110, 144220, 288440, 699467, 1398934, 2797868, 3497335, 5595736, 6994670, 13989340, 27978680]

約数ペア:

[(1, 27978680), (2, 13989340), (4, 6994670), (5, 5595736), (8, 3497335), (10, 2797868), (20, 1398934), (40, 699467), (97, 288440), (194, 144220), (388, 72110), (485, 57688), (776, 36055), (970, 28844), (1940, 14422), (3880, 7211)]