20451550

素因数分解:

$2^1\times 5^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{823}}^1$

素因数の和:913

約数の個数: 48

約数和(自身を含む): 44140032

約数和(自身を除く): 23688482

約数列:

[1, 2, 5, 7, 10, 14, 25, 35, 50, 70, 71, 142, 175, 350, 355, 497, 710, 823, 994, 1646, 1775, 2485, 3550, 4115, 4970, 5761, 8230, 11522, 12425, 20575, 24850, 28805, 41150, 57610, 58433, 116866, 144025, 288050, 292165, 409031, 584330, 818062, 1460825, 2045155, 2921650, 4090310, 10225775, 20451550]

約数ペア:

[(1, 20451550), (2, 10225775), (5, 4090310), (7, 2921650), (10, 2045155), (14, 1460825), (25, 818062), (35, 584330), (50, 409031), (70, 292165), (71, 288050), (142, 144025), (175, 116866), (350, 58433), (355, 57610), (497, 41150), (710, 28805), (823, 24850), (994, 20575), (1646, 12425), (1775, 11522), (2485, 8230), (3550, 5761), (4115, 4970)]