21978950

素因数分解:

$2^1\times 5^2\times 7^2\times {\mathrm{8971}}^1$

素因数の和:8997

約数の個数: 36

約数和(自身を含む): 47560572

約数和(自身を除く): 25581622

約数列:

[1, 2, 5, 7, 10, 14, 25, 35, 49, 50, 70, 98, 175, 245, 350, 490, 1225, 2450, 8971, 17942, 44855, 62797, 89710, 125594, 224275, 313985, 439579, 448550, 627970, 879158, 1569925, 2197895, 3139850, 4395790, 10989475, 21978950]

約数ペア:

[(1, 21978950), (2, 10989475), (5, 4395790), (7, 3139850), (10, 2197895), (14, 1569925), (25, 879158), (35, 627970), (49, 448550), (50, 439579), (70, 313985), (98, 224275), (175, 125594), (245, 89710), (350, 62797), (490, 44855), (1225, 17942), (2450, 8971)]