21681625

素因数分解:

$5^3\times 7^1\times {\mathrm{71}}^1\times {\mathrm{349}}^1$

素因数の和:442

約数の個数: 32

約数和(自身を含む): 31449600

約数和(自身を除く): 9767975

約数列:

[1, 5, 7, 25, 35, 71, 125, 175, 349, 355, 497, 875, 1745, 1775, 2443, 2485, 8725, 8875, 12215, 12425, 24779, 43625, 61075, 62125, 123895, 173453, 305375, 619475, 867265, 3097375, 4336325, 21681625]

約数ペア:

[(1, 21681625), (5, 4336325), (7, 3097375), (25, 867265), (35, 619475), (71, 305375), (125, 173453), (175, 123895), (349, 62125), (355, 61075), (497, 43625), (875, 24779), (1745, 12425), (1775, 12215), (2443, 8875), (2485, 8725)]