400180240

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{161363}}^1$

素因数の和:161407

約数の個数: 40

約数和(自身を含む): 960438528

約数和(自身を除く): 560258288

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 161363, 322726, 645452, 806815, 1290904, 1613630, 2581808, 3227260, 5002253, 6454520, 10004506, 12909040, 20009012, 25011265, 40018024, 50022530, 80036048, 100045060, 200090120, 400180240]

約数ペア:

[(1, 400180240), (2, 200090120), (4, 100045060), (5, 80036048), (8, 50022530), (10, 40018024), (16, 25011265), (20, 20009012), (31, 12909040), (40, 10004506), (62, 6454520), (80, 5002253), (124, 3227260), (155, 2581808), (248, 1613630), (310, 1290904), (496, 806815), (620, 645452), (1240, 322726), (2480, 161363)]