20721840

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{86341}}^1$

素因数の和:86357

約数の個数: 40

約数和(自身を含む): 64238448

約数和(自身を除く): 43516608

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 240, 86341, 172682, 259023, 345364, 431705, 518046, 690728, 863410, 1036092, 1295115, 1381456, 1726820, 2072184, 2590230, 3453640, 4144368, 5180460, 6907280, 10360920, 20721840]

約数ペア:

[(1, 20721840), (2, 10360920), (3, 6907280), (4, 5180460), (5, 4144368), (6, 3453640), (8, 2590230), (10, 2072184), (12, 1726820), (15, 1381456), (16, 1295115), (20, 1036092), (24, 863410), (30, 690728), (40, 518046), (48, 431705), (60, 345364), (80, 259023), (120, 172682), (240, 86341)]