399978988

素因数分解:

$2^2\times {\mathrm{31}}^1\times {\mathrm{101}}^1\times {\mathrm{109}}^1\times {\mathrm{293}}^1$

素因数の和:538

約数の個数: 48

約数和(自身を含む): 738904320

約数和(自身を除く): 338925332

約数列:

[1, 2, 4, 31, 62, 101, 109, 124, 202, 218, 293, 404, 436, 586, 1172, 3131, 3379, 6262, 6758, 9083, 11009, 12524, 13516, 18166, 22018, 29593, 31937, 36332, 44036, 59186, 63874, 118372, 127748, 341279, 682558, 917383, 990047, 1365116, 1834766, 1980094, 3225637, 3669532, 3960188, 6451274, 12902548, 99994747, 199989494, 399978988]

約数ペア:

[(1, 399978988), (2, 199989494), (4, 99994747), (31, 12902548), (62, 6451274), (101, 3960188), (109, 3669532), (124, 3225637), (202, 1980094), (218, 1834766), (293, 1365116), (404, 990047), (436, 917383), (586, 682558), (1172, 341279), (3131, 127748), (3379, 118372), (6262, 63874), (6758, 59186), (9083, 44036), (11009, 36332), (12524, 31937), (13516, 29593), (18166, 22018)]