18820720

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{7589}}^1$

素因数の和:7633

約数の個数: 40

約数和(自身を含む): 45175680

約数和(自身を除く): 26354960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 7589, 15178, 30356, 37945, 60712, 75890, 121424, 151780, 235259, 303560, 470518, 607120, 941036, 1176295, 1882072, 2352590, 3764144, 4705180, 9410360, 18820720]

約数ペア:

[(1, 18820720), (2, 9410360), (4, 4705180), (5, 3764144), (8, 2352590), (10, 1882072), (16, 1176295), (20, 941036), (31, 607120), (40, 470518), (62, 303560), (80, 235259), (124, 151780), (155, 121424), (248, 75890), (310, 60712), (496, 37945), (620, 30356), (1240, 15178), (2480, 7589)]